Chevrolet Head Casting Number Reference
Small Blocks
330545 350 73 Corvette 76cc 2.02 / 1.6 Valves
333881 350 74-75 76cc 2.02 / 1.6 Valves
333882 350-400 74-80 76cc 160 / 60cc Ports
340292 "Turbo" Angle Plug, 64cc, 2.02 / 1.6 valves
354434 262-267-30575-79 163/57 cc Ports Light Weight Casting
358741 305 76-79
376450 262,305,350 84-81 168 / 60cc Ports
376455 350 77-85
458642 350-400 67-70
462624 350-400 75-86 161 / 62cc Ports
468642 350-400 76-80 Small Spark Plugs
471513 267,350 79
517513 267,350 79
3030817 400 74
3636839 265 55
3703523 265 55 Corvette
3703524 265 55
3713358 265 55-56
3713569 265 55-56
3720991 265 56-57
3731262 265 56 2 4 Barrel Carburetors Corvette
3725306 265 56-57
3731539 57 Corvette Fuel Injected
3731544 283 57-61
3731548 283 57-62
3731554 283 57-61
3731556 283 57 Truck
3731762 265 2 4 Four Barrel Carburetors 56 Corvette
3737739 283 57-62 Corvette Fuel Injected
3737775 283,327 62-67
3740997 283 57
3743056 283 58
3743096 327 62-67 G.M.C Truck
3747363 283 57-61
3747460 283, 327 59-67
3748720 283 57-58
3748770 283 1 - 4 Barrel and , 2 - 4 Barrel Carburetor, Corvette Fuel Injected X 58, With Staggered Valve Cover Bolts
3748772 283 58-61
3755537 283 57-62
3755539 283 58-62 Staggered Valve Cover Bolts
3755549 283 57-62
3755550 283 59 Corvette Staggered Valve Cover Bolts
3755585 327 62-67 G.M.C Truck
3756519 283 57-62
3760116 283 60-64
3767460 283,327 60-64
3767462 327 62-67 161 / 65cc Ports
3767465 283 59-61
3767754 283 59-61 Power Pack Heads
3767792 283 60-64
3770126 327 69
3774682 283, 327 60-64
3774684 327 62-64 Passenger Car and Truck
3774692 283 60-61 Corvette
3774692 283 58-64 Passenger or Power Pack Head
3782461 327 64-66 Double Hump or Camel Hump 161 / 62cc Ports
3782461X 327 60-63 Larger Intake Runners, 172 / 64cc Port (other notes suggest Fuel Injection)
3782870 327 62-37
3789817 327 62-67
3789935 283 57-62
3790721 283 64-67
3792563 327 65-67
3795896 283 63-65 Power Pack Heads
3795896 327 62-64 Corvette 250 HP 140 / 60cc Ports
3798996 327 63-67
3814480 283, 327 60-67
3814482 327, 350 62-67 75cc Low Compression Heads
3817680 283, 327 63-67
3817681 327, 350 62-67
3817682 283 61-62
3836839 265 55
3836842 283,327 57-67
3837064 265, 283 56-62
3837065 265 55-56 Truck
3837739 283 57
3848720 283 57-58
3849852 283 57-67
3849935 283 65-67
3852174 327 62-64
3854520 283, 327 62-67 140 / 60cc Ports
3870064 265, 283 56-62
3870065 265 55-56 Truck
3876775 283, 327 210 HP Camaro Accessory Bolt Holes on one end only
3884520 283, 327 60cc
3890462 302, 327 350 Camel Hump or Double Hump 161 / 165cc Intake Port
3901068 350 285HP Crate Engine 64cc, 72º Intake Bolt Angles
3911032 307, 327 68 Without Accessory Bolt Holes
3912264 283 58-62
3912265 283 63-64
3912311 327 67
3912313 327 65-67
3917290 307, 327, 67-68 142 / 59cc Ports
3917291 302, 327, 350 Camel Hump or Double Hump 161 / 65cc Ports
3917292 327 350 68 Corvette Camel Hump or Double Hump
3917293 307, 327 75cc 144 / 58cc Ports
3927185 307, 327 69cc 69-70
3927186 302, 350 Camel Hump or Double Hump 63cc Chamber 161 / 65cc Ports
3927187 350 69-70 Camel Hump or Double Hump 64cc
3927188 307, 74cc
3928455 302, 327 68
3928494 327, 350 68
3928495 327 68
3931633 307 68-72
3931635 250 68-76
3931637 327 68-69
3931638 327 68 Truck
3932441 350 76cc 161 / 165cc Intake Port
3932441X 350 80cc 1.94 / 1.5 Valves 161 / 65cc Port
3932441X 400 80cc 1.94 / 1.6 Valves 161 / 65cc Intake Port
3932454 307 69
3946812 350 69
3946813 350 69-70 138 / 72cc Ports
3747041 302, 350 64cc
3951598 400 70 76cc
3964286 350
3970126 327, 350 67-70
3973414 350 70 LT-1 64cc Camel Hump or Double Hump Heads
3973487 350 71-76
3973487 350 LT-1 75cc 161 / 165cc Intake Port
3973487X 350 75cc Larger Intake Ports
3973493 400 71 76cc
3986316 350 71 Corvette 76cc
3986336X 350 76cc
3986388 307, 350 68-76
3986339 307, 350 71 75cc
3986339X 307,350 75cc
3991492 350 70 LT-1 64cc Straight Plugs Camel Hump or Double Hump
3991492 70 Straight or Angle Plugs 64cc 157 / 62cc Ports
3998916 350 LT-1 76cc Screw in Rocker Arm Studs
3998920 350 72-73
3998991 307,350 73 75cc Hardened Valve Seats
3998991 307, 350 72-73 75cc
3998993 307, 350 73 75cc Hardened Valve Seats
3998993 307, 350 72-73 76cc 164/64cc Ports
3998993 350 Crate Mexico Made 159/64cc Ports
3998993 350,400 73 76cc Hardened Valve Seats
3998997 350, 400 72-73 76cc
3998997 305, 350 161 / 165cc Intake Port Hardened Valve Seats
4079261 350 75
10033867 Pontiac Aluminum Racing Heads Angle Plugs 62cc - 196cc Intake Port 23º 2.10 -1.625 Valves
10045434 Pontiac Aluminum Racing Heads Angle Plugs 55cc Raised Intake Runner 15º Roll Over
10051101 Bow Tie Aluminum Angled Plugs 55cc Raised Intake Runner 196cc Intake Port
10088113 350 88-93 Corvette Aluminum Angled Plugs 58cc 1.94 -1.5 valve Super Light Weight
10106178 350 90 LT-5 and ZR-1 Dual Over Head Cam 32 Valve Passenger's Side
10106179 350 90 LT-5 and ZR-1 Dual Over Head Cam 32 Valve Driver's Side
10110810 350 93 Generation I
10128374 350 Generation II LT-1 53cc Angled Plugs Corvette Aluminum Reverse Flow Cooling System 168-175 cc Intake Port
10134352 Bow Tie Low Port Aluminum with 18º Angled Plugs 45cc 223cc Intake Ports
10134363 Bow Tie High Port Aluminum with 18º Angled Plugs 45cc 210cc Intake Ports
10134363 Bow Tie High Port Aluminum with 18º Angled Plugs 60cc 215cc Intake Ports
10134363 Bow Tie High Port, Aluminum with 18º Angle Plugs 50cc 250cc Intake Ports CNC Machined 2.15 / 1.625 Valves
10134363 Bow Tie High Port Aluminum 18º Angle Plugs 65cc 250cc Intake Ports CNC Machined 2.15 / 1.625 Valves
10134363 Bow Tie High Port Aluminum 15º Angle Plugs 36cc 223cc Intake Ports
10174389 350 90-95 LT-5 and ZRI Dual Over Head Cam 32 Valve Driver's Side
10174390 350 91-95 LT-5 and ZRI Dual Over Head Cam 32 Valve Passenger's Side
10185040 Symmetrical Port splayed valve Aluminum 45cc 263cc Intake Port 1st design
10185040 Symmetrical Port splayed valve alm, 45cc, 263cc intake port, 2nd. design
10205245 350 93 Generation II LT-1 Aluminum Reverse Flow Cooling System 168-175 Intake Port
10207643 350 94-96 Generation II LT-1 Aluminum Reverse Flow Cooling System
10225121 350 94-95 LT-1 and ZR1 Dual Over Head Cam 32 Valve Driver's Side
10225122 350 94-95 LT-1 and ZR1 Dual Over Head Cam 32 Valve Passenger's Side
10239902 350 96- Generation II LT-4 Aluminum Reverse Flow Cooling System
10239906 350 Vortec 5700 L-31 64cc Heart Shaped Chamber 1.94 / 1.5 170cc Intake Ports
14010201 305 84
14011034 Bow Tie Phase 2 Iron Angle Plugs 64cc 2.02 / 1.6 184cc .080 Taller Intake Ports
14011039 350 High Performance Replacement Aluminum
14011049 Bow Tie Phase 6 Aluminum Angled Plugs 55cc 2.02 / 1.6 or 2.1 / 1.65, 180cc Intake Ports
14011083 350 300 HP Crate Engine 64cc 90º Manifold Bolt with Hardened Valve Seats
14011083 350 87-95 64cc Center Bolt Valve Covers 72º Manifold Bolt
14014415 267, 305 80-85
14014416 305 80-85 High Output 58cc 1.84 / 1.5 165/59cc Ports
14022601 267, 305 80-85 High Output 58cc 1.84 / 1.5
14022801 305 80-85
14071114 350 80-85
14079261 350 86
14096217 350 285 HP Crate Engine 1.94 / 1.5, 72º Intake Bolts 64cc Center Bolt Valve Covers
14101081 305 87-88 Camaro Center Bolt Valve Covers
14101083 350 285 HP and 300HP Crate Engine 1.94 / 1.5 72º Intake Bolts
14101128 350 86-87 Aluminum Corvette with Angled Plugs 58cc
14102187 305 87-91 High Output 1.85 / 1.5 58cc
14102191 305 87-95 350 Center Bolt Valve Covers
14102193 305, 350 87-95
24502559 Bow Tie Aluminum Mirror Ports
More Castings
33417369 350 Generation I Crate Engine Mexico Made 76cc 1.94 / 1.5 Flange Valve Cover Heavier Casting
366298 Bow Tie, Aluminum Billet Main Caps 3.398" Bore with Sleeves Two Piece Rear Main Seal
366299 Bow Tie Aluminum Nodular Iron Splayed Main Caps 4.00" Bore
389257 302 67 2 Bolt Main Caps
393288 283 65-67 2 Bolt Main Caps
460703 350 78 4 Bolt Main Caps
460776 305 78-79 2 Bolt Main Caps
460777 305 78-79 2 Bolt Main Caps
460778 305 78-79 2 or 4 Bolt Main Caps Some Canadian Assembled Heavy Duty Truck Blocks Have 4 Bolt Main Caps
471511 267 79-82 2 Bolt Main Caps
3556519 283 58-61 2 Bolt Main Caps
3703524 265 55 2 Bolt Main Caps No Oil Filter (This Casting Design Was Short Lived For Obvious Reasons)
3720991 265 56-57 2 Bolt Main Caps
3731548 265 57 2 Bolt Main Caps No Side Motor Mounts (This Engine Mount Was Attached to the Front)
3731548 283 57 2 Bolt Main Caps No Side Motor Mounts (This Engine Mount was Attached to the Front)
3737739 283 58-64 2 Bolt Main Caps
3756519 283 58-62 2 Bolt Main Caps
3782870 327 62-67 2 Bolt Main Caps
3789817 283 62-64 2 Bolt Main Caps
3789817 327 62-67 2 Bolt Main Caps
3789935 283 61-67 2 Bolt main Caps
3790721 283 62-64 2 Bolt Main Caps This Engine was Designed for the Chevy II and had a Recessed Oil Filter Boss
3790721 327 65-66 2 Bolt main Caps This Engine was Designed for the Chevy II and had a Recessed Oil Filter Boss
3791362 327 62-67 2 Bolt Main Caps This Engine was Designed for the Chevy II and had a Recessed Oil Filter Boss
3792563 327 65 2 Bolt Main Caps
3792582 283 64-65 2 Bolt Main Caps
3794226 283 58-63 2 Bolt Main Caps
3794460 327 62-64 2 Bolt Main Caps
3830944 327 63 2 Bolt Main Caps
3834810 283 64-66 2 Bolt Main Caps
3834812 283 62-63 2 Bolt Main Caps
3837739 283 58-62 2 Bolt Main Caps
3849852 283 57-66 2 Bolt Main Caps
3849935 283 65-67 2 Bolt Main Caps
3858174 327 64-67 2 Bolt Main Caps
3858180 327 64-67 2 Bolt Main Caps
3858618 350 68-76 2 Bolt Main Caps
3862194 283 65-67 2Bolt Main Caps This Engine was Designed for the Chevy II and had a Recessed Oil Filter Boss
3862812 283 62-64 2 Bolt Main Caps
3892657 302 67 2 Bolt Main Caps Camaro Z-28
3892657 327 67 2 Bolt Main Caps
3892657 350 67 2 Bolt Main Caps Camaro
3896944 283 66-67 2 Bolt Main Caps
3896948 283...66-67...2
3903352 327.....67....2
3914636 307.....68....2
3914638 307.....68....2
3914653 307...68-73...2
3914660 327.....68....2
3914678 302.....68....2...Z-28 Camaro
3914678 327.....68....2
3914678 350.....68....2
3931174 307.....68....2...Truck
3932371 307...69-73...2
3932373 307...68-73...2
3932386 302.....69....4...Z-28 Camaro
3932386 327.....69....2
3932386 350.....69....4
3932388 327.....69....2
3932388 350.....69....2 or 4
3933180 327...68-69...2
3951509 400...70-71...4
3951509 400...74-80...2
3951511 400...70-73...4...Some replacement blocks had 2-bolt main caps
3956618 302.....69....4...Z-28 Camaro
3956618 327...68-69...2
3956618 350.....69....2 or 4
3956632 307.....69....2
3959512 327...62-67...2...Was also used for some "CE" replacement blocks
3959532 283...64......2...Used for some "CE" replacement blocks
3959538 327...........2...Chevy II recessed oil filter boss, Used for some Chevy II "CE" replacement blocks
3970010 302.....69....4...Z-28 Camaro
3970010 327.....69....2...Trucks and industrial
3970010 350...69-80...2 or 4
3970014 350...70-76...2 or 4
3970020 307...69-73...2
3970024 307...69-73...2
4715111 305.....80....2
6259425 350...69-76...2
140029 350...80-84...2
330817 400...72-80...2
355909 262.....75....2
355909 305...76-79...2
360851 262...75-76...2...Monza V-8
361979 305...77-79...2 or 4, some Canadian assembled heavy duty blocks have 4-bolt main caps
366245 350...78-79...4...Bowtie
366286 4...Bowtie, siamesed straight nodular iron main caps, 2-piece seal, 4.00-4.150" bores, 2.45" main journals
10036033...350...........4...Goodwrench crate motor, 2-piece rear seal, "Hecho en Mexico"
10046164...305.....86....2
10049804.................4...Aluminum, Pontiac Super Duty version of Gen.I SBC, 4.00" bore, 350 mains, 2-piece rear seal, splayed caps, GTP race block
10051182.................2 or 4...Bowtie, 3.75"-4.30" bores, 1 or 2-piece rear seal
10051184.................4...Bowtie, 4.00"-4.155" bores, 1 or 2-piece rear seal
10054727...350...86-up...2 or 4...one piece rear seal, some "Made in Canada"
10066036...350...........2 or 4...Target Master/Goodwrench crate motor, 2-piece rear seal, "Hecho en Mexico"
10066038...350.....92....4...Goodwrench crate motor, 2-piece rear seal, "Hecho en Mexico"
10090511...350.....90....2...LT-5, ZR1 Vette, 375hp
10125327...350...92-up...2 or 4...Gen.II LT-1, reverse flow cooling
10125327...350...96-up...2 or 4...Gen.II LT-4, reverse flow cooling
10134398.................4...Bowtie, Aluminum, 4.125" bore, 2.65" main journals
10134996.................4...Bowtie, Aluminum, 4.125" bore 2.65" main journals
10153558...350...91-92...4...LT-5, ZR1 Vette, 375hp
10168588...265...94-96...2...L99, Gen.II, 4.3 Liter V-8, Caprice, reverse flow cooling
10199001...350...93-95...4...LT-5, ZR1 Vette, 405hp
10243878...305...96-98...2...Vortec truck, roller cam, one-piece rear seal
10243880...350...95-00...2 or 4...Vortec truck, Gen.I crate motors and "ZZ4", roller cam, one piece rear seal
12550592...350...97-up...crossbolted block, Gen.III, "LS1", aluminum
12551358.........99-up...Gen.III, 4.8L or 5.3L, cast iron, truck
12551364...364...98-04...crossbolted cast iron Gen. III, 6.0L, truck
12559378...350...99-up...crossbolted block, Gen.III, "LS1", aluminum
12559846...350...98-up...crossbolted block, Gen.III, "LS1", aluminum
12560621...350...98-up...crossbolted block, Gen.III, "LS1", aluminum
12560626...350...99-up...crossbolted block, Gen.III, "LS1", aluminum
12560629...350...99......crossbolted block, Gen.III, "LS1", aluminum
12561168...350...01-up...crossbolted block, Gen.III, "LS1", aluminum
12562174...350...98-up...crossbolted block, Gen.III, "LS1", aluminum
12568952...364...05-up...crossbolted block, Gen.III, 6.0L, aluminum, LS2
12566910...325...04-up...crossbolted block, Gen.III, 5.3L, aluminum, SSR truck
12571048...325...04-up...crossbolted block, Gen.III, 5.3L
12573581...364...98-04...crossbolted cast iron, Gen.III, 6.0L, truck
12577184...364...98-04...crossbolted cast iron, Gen.III, 6.0L, truck
12577396.........02-up...Gen.III, 4.8L or 5.3L, cast iron, truck
14010201...305...80-85...2
14010202...305...80-85...2
14010203...305...80-85...2
14010207...350...80-85...2 or 4
14010209...350...80-85...2 or 4
14010280...267...79-82...2
14011064...350...83......4
14011148...350...87-89.......Roller cam, one-piece rear seal
14016376...267...79-82...2
14016379...350...77-79...2 or 4
14016381...305...80-84...2
14016382...305...79-84...2
14016383...305...80-85...2...Truck
14079287...350...86-90.......Truck
14088526...350...87-89.......Roller cam, one-piece rear seal
14088548...350...86-88...2 or 4
14088551...305...86-87...2...one-piece rear main seal
14093627...305...87-94...2...Roller or flat tappet cam, one-piece rear seal
14093638...350...87-95...2 or 4...Roller or flat tappet cam, one-piece rear seal
14094766...305...86-up...2...One-piece rear seal
14101147...305...85-up...2
14101148...350...86-90...4...One-piece rear seal
14102058...305...87-91...2...Roller cam, one-piece rear seal
22551656.................4...Rocket block, 4.00"-4.190" bores, 2.45" main journal sizes, splayed caps, dry sump, 2-piece rear seal, 9.025" deck
330545.....73......350..........76cc chamber, 2.02/1.60
333881.....74-75...350..........76cc chamber, 2.02/1.60
333882.....74-80...350/400......76cc chambers
340292.....70's.......Over the counter, angle plug, 64cc chamber
354434.....75-79...262/267/305...60cc chambers
358741.....76-79...305
376445.....77-85...350..........76cc chamber, small valves
376450.....75-81...262/267/305..6 or 7 exhaust bolt holes, 60cc chamber
462614.....77-79...305..........60cc chamber
462624.....75-86...350/400......76cc chamber, 1.72/1.5, 1.94/1.5 or 2.02/1.6 valves
458642.....75-84...350..........350
468642.....76-up...350/400
471513.....79......267/350
517513.....79......267/350
1816887....63......283..........Made in "Canada", GMC HD truck
3636839....55......265
3703523....55......265
3713358....55-56...265
3713569....55-56...265
3725306....56......265
3731539....57......283..........283 HP FI
3731544....57-61...283
3731554....57-62...283
3731556....57......283..........Truck, Made in Canada
3731762....56......265..........Vette, 2x4 carbs
3737775....62-67...283/327
3740997....57......283..........1x4, 2x4 & FI (exc.-283hp)
3743056....58......283
3743096....62-67...327..........GMC Truck
3747363....57-61...283
3747460....59-67...283/327......70cc chambers
3748770....58......283
3748772 58-61...283
3755537 57-62...283
3755539 58-62...283
3755549 57-62...283
3755550 59......283
3755585 62-67...327..........GMC Truck
3767460 59-60...283
3767462 62-67...327
3767465 59-61...283
3767754 59-61...283..........60cc chambers
3767792 60-64...283
3774682 60-64...283/327......70cc chambers
3774684 62-64...327..........75cc chambers
3774692 58-64...283..........60cc chambers
3782461....64-66...327......Camel hump,no accessory holes,160/62cc port volumes,62cc chamber
3782461X...60-63...283/327..Camel hump,no accessory holes,larger 172/64cc port volumes, 62cc chamber
3795896....63-65...283......60cc chamber
3795896....62-64...327......60cc chamber
3798996....63-67...327
3814480....60-67...283/327..70cc chambers, 1.72/1.5 valves
3814482....62-67...283/327/350..75cc chambers
3817680....63-67...283/327
3817681....62-67...327
3817682....61-62...283
3836839....55......265
3836842....57-67...283/327
3837064....56-62...265/283
3837065....55-56...265..........Truck
3848720....57-58...283
3876775....60-67...283/327......75cc chamber
3884520....60-67...283..........Some marked "Made in Canada", 60cc chamber, also used by Studebaker
3884520....62-67...327..........Some marked "Made in Canada", 60cc chamber, also used by Studebaker
3890462....66-67...302/327/350..Camel hump,no accessory holes,64cc chamber
3901068....87-up...350..........Crate motor, 285hp, 64cc chamber
3911032....68......307/327......70cc chamber
3912264....58-62...283
3912265....63-64...283
3912311....65-67...327
3912313....65-67...327
3917290....67-68...307/327
3917291....67-68...302/327/350..Camel hump,no accessory holes,64cc chamber
3917292....68......327/350......Camel hump,64cc chamber
3917293....67-68...307/327......75cc chambers
3927185....69-76...307/327/350..70cc chambers
3927186....69-70...302/350......Camel hump,64cc chambers,accessory holes
3927187....69-70...350..........Camel hump,64cc chambers,accessory holes
3927188....69......327..........74cc chambers
3927188....70......307..........74cc chambers
3931633....68-73...307
3931635....68-76...350
3931638....68......327..........Truck
3932441....69-70...350..........76cc chambers
3932441X...69-70...350/400......80cc chambers
3932454....69-73...307
3932454....69-79...350..........Truck
3946812....69......350
3946813....69-79...350..........Truck
3947040....68......327.........."Right angle" casting identifier, 64cc chambers, good HP head,
used in trucks, no accessory holes
3947041....69-70...302/350......"Right angle" casting identifier, 64cc chamber, accessory holes, good HP head
3947041X...69-70...302/350......"Right angle" casting identifier, 64cc chamber, 165cc intake port, accessory holes, good HP head
3951598....70......400..........76cc chambers
3964286............350
3965742....70......350..........over the counter, angle plug
3970126....67-71...327/350
3973370....69-70...350..........over the counter in US, Canadian 350/300hp production use in Pontiac, 64cc, straight or angle plug
3973414....70......350..........LT1-370hp, Camel hump, 64cc chamber
3973487....71-72...350..........used on 71-72 350 LT1, 75cc chamber
3973487X...71-72...350..........75cc chamber
3973493....71-72...400..........76cc chamber
3986316....71......350..........76cc chamber
3986336....71......350..........76cc chamber
3986336X...71......350..........76cc chamber
3986339....71......307/350......74cc chamber
3986339X...71......307/350......74cc chamber
3986388....68-76...307/350
3991492....70......350..........LT1,Camel hump,accessory holes,64cc, straight plug
3991492....70-up................over the counter,Camel hump,64cc, straight or angle plug
3998916....72......350..........also used w/'72 350 LT1,big valves, screw in studs,76cc chambers
3998920....72-73...350
3998991....72-73...307/350......75cc chambers
3998993....72-73...307/350......75cc chambers
3998993....current..350.........Goodwrench crate motors,"Hecho en Mexico",75cc chambers
3998997....72-73...350/400......76cc chambers
3998997....78-84...305/350......76cc chambers
4079261....75......350
10033867........................Aluminum,over the counter Pontiac 23' head,62cc,angle plug, 196cc intake port
10045434........................Over the counter Pontiac 15' head
55cc, angle plug, raised runner
aluminum, "roll over" head
10051101........................Bowtie, aluminum, 55cc, angle plug
raised runner, 196cc intake port
10065202...87-95...350..........Truck
10065203...87-95...350..........Truck
10065204...87-95...350
10065205...87-95...305
10065206...87-95...350
10065207...87-95...305
10088113...88-up...350..........Aluminum, 58cc, angle plug, raised
"D" port exhaust, 1.94"/1.5" valves
10093328........................Over the counter, Pontiac 15' head
aluminum,224cc ports, 61cc chambers,
"roll over" head
10106178...90......350..........LT5, ZR1, DOHC, 32-valve,
pass. side, aluminum
10106179...90......350..........LT5, ZR1, DOHC, 32-valve,
drvs. side, aluminum
10110810...91-up...350..........Gen. 1, 65cc chambers
10120928...87-95...350
10125320...94-96...350..........Gen.II LT1, cast iron version, used
on "9C1" Police package, Impala SS,
Cadillac Fleetwood, Buick Roadmaster
reverse flow cooling
10128374...92-up...350..........Gen.II LT1, 53cc, angle plug,
aluminum, reverse flow cooling,
175/68cc ports
10134352........................Bowtie, 45cc, angle plug, "low"
port, 223cc intake port, aluminum,
18' race head
10134363........................NOTE: This casting # has been used
in many different versions of this
aluminum 18' and 15' Bowtie race head.
Different chamber volumes, port
volumes, port locations, valve sizes,
etc. were used. Check this casting
carefully to determine which features
it may have. There are at least 6
different versions as of 11/99.
10147898...95-98...350..........Gen.I crate motor
10159550...87-95...350
10159551...87-95...305
10159552...87-95...350
10159553...87-95...305
10174389...91-94...350..........LT5, ZR1, DOHC, 32-valve,
drvs. side, aluminum
10174390...91-95...350..........LT5, ZR1, DOHC, 32-valve,
pass. side, aluminum
10185040........................Bowtie, aluminum, 45cc chambers,
1st version, symmetrical ports,
263cc intake ports, splayed valves
10185040........................Bowtie, aluminum, 45cc chambers,
2nd version, symmetrical ports,
240cc intake ports, splayed valves
10205245...93......350..........Gen.II LT1, aluminum, reverse
flow cooling, 175/68cc port volumes
10207643...94-96...350..........Gen.II LT1, aluminum, reverse
flow cooling, 175/68cc port volumes
10208890...94-96...265..........Gen.II, L99, 4.3 Liter V-8, cast iron, reverse flow
10215339...97......350..........Gen.III, LS1, aluminum, 68cc
10225121...94-95...350..........LT5, ZR1, DOHC, 32-valve,
drvs. side, aluminum
10225122...95......350..........LT5, ZR1, DOHC, 32-valve,
pass. side, aluminum
10239902...96-up...350..........Gen.II LT4, aluminum, reverse
flow cooling, 195cc port, 54.4cc chamber, angle plug
10239906...96-up...350.........."Vortec 5700", "L31", 64cc chamber,
170cc intake port, 1.94"/1.5" valves
12367712...99-up................"Fast Burn", aluminum, 210cc intake,
port, 2.00/1.55 valves, 62cc chamber
12367713...99-up................"Fast Burn" used on ZZ430 crate motor, aluminum, 210cc intake
port, 2.00/1.55 valves, 62cc chamber
12480005...2000.................LS1 "GTZ", aluminum, 38cc, 2.125"/1.625" valves, angle plug
12480011...97-up................Bowtie "SB2.2", aluminum, 2nd
version of "SB2", 48cc chambers,
"mirror ports", revised valve
angles & plug location
12506450...87-95...350
12509859...87-94...305
12516852...87-95...350
12529742...95-96...265..........Gen.II, "L99", cast iron
12551561...96......350..........Gen.II, "LT1", aluminum
12552520...97-up...305..........Vortec, truck
12554290...94-96...350..........Gen.II, "LT1", cast iron version, used
on "9C1" Police package, Impala SS,
Cadillac Fleetwood, Buick Roadmaster
reverse flow cooling
12554291...95-96...265..........Gen.II, "L99", cast iron
12555690...96......350..........Gen.II, "LT4", aluminum
12556743...99......325..........Gen.III, 5.3L, aluminum, truck, van
12558059...97......305..........Vortec, truck, 1.84"/1.5" valves
12558062...98......350..........L31 Vortec, truck, 64cc chambers, 1.94/1.5, 170cc intake port
12558806...97-98...350..........Gen.III, "LS1", aluminum, 68cc
12559853...99-up...350..........Gen.III, "LS1", aluminum, 68cc
12559862...99-00................Gen.III, aluminum 4.8/5.3L
12559895...00-up...325..........Gen.III, aluminum, Vortec 5.3L
12561706...01-04................Gen.III, 5.3L, aluminum
12561873...99-01...364..........Gen.III, 71cc, iron
12562317...01-04...364..........Gen.III, 71cc, aluminum
12564241...00-up...350..........Gen.III, "LS1", aluminum, 68cc
12564243...01-up...350/364......Gen.III, "LS6", "LS2", aluminum
12572035...01-04...364..........Gen.III, 6.0L, aluminum, 71cc
14008856...79-81...267
14010201...82-85...305
14011034........................Bowtie, cast iron, 64cc chambers,
184cc port volume, angle plug,
"Phase II" head
14011049........................Bowtie, aluminum, 55cc chambers,
angle plug, 180cc ports, "Phase 6"
14011083...55-86...350..........Crate motor for years indicated.
285/300hp, 64cc chambers, 1.94"/1.5" valves
14014415...80-85...267/305
14014416...80-86...305..........1.84"/1.5" valves, 58cc chambers
14014440...80......305..........1.84"/1.5" valves
14019821...80-86...350
14019924...79-81...267
14019926...80-86...350
14010516...80-86...350
14020517...80......350
14020555...81......305
14020556...81......350
14022056...85......350
14022206...80......350
14022301...80-86...305
14022601...80-86...267/305......1.72"/1.5" or 1.84"/1.5" valves, 53cc chambers
14022801...80-86...305
14024816...........350..........76cc chambers, 1.94/1.5 valves, Gen.I crate motors
14034806...78-82...267
14034807...78-86...305
14034808...80-86...350
14034808...96-up...350..........76cc chambers, 1.94"/1.5" valves, Gen.I Goodwrench crate motors
14034810...80-86...350..........Truck
14034811...80-86...350..........Truck
14039121...81-86...305..........Truck
14039122...81-86...305..........Truck
14071114...80-86...350
14075381...80-86...350..........Truck
14079261...86......350
14085844...80-86...350..........Truck
14085963...86......350
14088526...........350..........Gen.II, LT1, aluminum
14089119...86-88...350
14094093...86-88...350
14096217...55-86...350 Crate285hp/300hp, 64cc chambers, 72' or 90' center intake manifold bolt angles
14101081...87-95...305
14101083...87-up...350..........Gen.I, also used on crate motors, 285 or 300 hp, 64cc
chambers, 72' center manifold bolt
angles
14101128...86-87...350..........Aluminum, 58cc, angle plug
14102187...87-91...305..........1.84"/1.5" valves
14102191...87-up...350
14102193...87-up...305/350......1.94"/1.5" valves
22542525........................Dart/Olds/Chevy aluminum, 14'or 17' race head.
24502559...96-97................Bowtie, "SB2", 1st version,
"mirror ports", aluminum, 196cc port, CNC version 280cc port, 38cc chamber
25500141........................Buick/Chevy aluminum, 10' race head,
42cc chambers, symmetrical ports,
235cc intake port volumes,
2.1"/1.625" valves
25534351C..04-up................Gen.I Bowtie, cast iron Vortec head, 175/65cc ports, 2.00/1.55 valves, "small port head"
25534371C..04-up................Gen.I Bowtie, cast iron Vortec head, 206/77cc ports, 2.00/1.55 valves, "large port head"
33417369...90-up...350..........Gen.I Goodwrench crate motor,"Hecho en Mexico", 76cc
World Products Cast Iron Heads ( by part numbers )
4351 67cc, 162cc intake port
4350 76cc, 162cc intake port
4205 58cc, 162cc intake port, 305 torquer
4256 67cc, 172cc intake port, torquer
4257 76cc, 172cc intake port, torquer
Trick Flow Twisted Wedge Alm ( by part number )
31400001 64cc, 2.02-1.6, screw in studs, guide plates,185cc intake ports, candid valve angles
31400002 same 01, except with 72º intake bolts for 87-up
31400003 same 01, except with center valve cover bolt, 86- up
31400005 same 01, except 1.440 valve springs
31400006 same 01, except, with 72º intake bolts, old style valve covers
Edelbrock Alm. Heads
6061 Performer RPM Bare head, angle plug, 70cc
6063 Performer RPM Bare head, straight plugs, 70cc
6071 Performer RPM Same as 6061 exc. complete
6073 Performer RPM 70cc, 170cc intake port, straight plug, complete
6075 Performer 65-up, 70cc, 2.02-1.6, screw in studs, guide plates, heat riser
6085 Performer 87-93, center bolt valve cover, 60cc
6087 Performer 87, center bolt valve cover, 60cc, 165cc intake port
7700 Vr. Jr. Race Heads, Bare, 71cc, 212-267cc port, CNC Machined, 2.08-1.6,
7720 Same as 7700 exc complete
Big Blocks
058 241/86 cc port
063 256/114 cc port
083 243/110cc port
215 256/114cc port
241 252/116cc port
280 256/114cc port
290 256/114cc port
290 262/115cc port small plug head
291 327/120cc port
340 320/120cc port
820 255/114cc port
840 326/120cc port
842 318/112cc port
990 323/127cc port
330864 396-454 70-81 Oval Port
330865 366-427 70-76 Truck HD Oval Port
336781 454 73-85 Oval Port
343771 366-454 68-85 Truck HD
343772 366-454 76-84 Truck HD Oval Port
346236 454 75-76 Oval Port
353049 400-402 70-76 Oval Port
473328 366 68-85 Truck HD Oval Port
3732791 348 58
3758379 348 59-61
3759256 348 58
3767738 348 59-61
3781147 348 60-61 Hi Perf
3795586 409 61 360HP
3814690 409 62-64 Hi Perf
3819333 348-409 62-65 Truck
3830817 409 63-65 340 HP
3837731 409 63 RPO Z11
3852583 409 65 400 HP
3856206 396 65 Oval Port
3856208 396 65 Corvette 425 HP Sq. Port
3856213 366 66-82 Oval Port
3856260 396 68
3872702 396-427 66 Oval Port
3873858 396, 427 66 Sq. Port
3876875 427 77-85 Truck Oval Port
3904390 396-427 67 Oval Port
3904391 396-427 67 Sq. Port
3904392 427 67 Sq. Port Almuminum L-88 & L-89
3904393 366 66-68 Truck Oval Port
3909802 396-427 67 Oval Port
3917215 396-427 68 Oval Port
3917219 366-427 68-85 Truck HD Oval Port
3919840 396-427 67-69 Sq. Port
3919842 396-427 68-69 L-88 & L-89 Alm
3931063 396-427 68-72 Oval Port
3933148 366-427 68-84
3933149 427 68-76 Truck
3946074 454 69-71 Alm. L-88, ZL-1, LS-6
3964290 400-454 70 Oval Port
3964291 402-454 70 Sq. Port L-78, LS-6
3965198 396 68-69 Oval Port
3975950 366-427 68-70 Truck Oval Port
3986133 366-427 68-85 Truck Oval Port
3986136 366-427 68-84 Truck Oval Port
3993820 400-454 71-72 Oval Port
3994026 454 71 LS-6 Sq. port
3999241 402-454 72 Oval Port
6272292 402-454 70-75 Oval Port
14092359 427 86-88 Truck Oval Port
14092360 454 85-88 Truck Oval Port
Small Blocks
330545 350 73 Corvette 76cc 2.02 / 1.6 Valves
333881 350 74-75 76cc 2.02 / 1.6 Valves
333882 350-400 74-80 76cc 160 / 60cc Ports
340292 "Turbo" Angle Plug, 64cc, 2.02 / 1.6 valves
354434 262-267-30575-79 163/57 cc Ports Light Weight Casting
358741 305 76-79
376450 262,305,350 84-81 168 / 60cc Ports
376455 350 77-85
458642 350-400 67-70
462624 350-400 75-86 161 / 62cc Ports
468642 350-400 76-80 Small Spark Plugs
471513 267,350 79
517513 267,350 79
3030817 400 74
3636839 265 55
3703523 265 55 Corvette
3703524 265 55
3713358 265 55-56
3713569 265 55-56
3720991 265 56-57
3731262 265 56 2 4 Barrel Carburetors Corvette
3725306 265 56-57
3731539 57 Corvette Fuel Injected
3731544 283 57-61
3731548 283 57-62
3731554 283 57-61
3731556 283 57 Truck
3731762 265 2 4 Four Barrel Carburetors 56 Corvette
3737739 283 57-62 Corvette Fuel Injected
3737775 283,327 62-67
3740997 283 57
3743056 283 58
3743096 327 62-67 G.M.C Truck
3747363 283 57-61
3747460 283, 327 59-67
3748720 283 57-58
3748770 283 1 - 4 Barrel and , 2 - 4 Barrel Carburetor, Corvette Fuel Injected X 58, With Staggered Valve Cover Bolts
3748772 283 58-61
3755537 283 57-62
3755539 283 58-62 Staggered Valve Cover Bolts
3755549 283 57-62
3755550 283 59 Corvette Staggered Valve Cover Bolts
3755585 327 62-67 G.M.C Truck
3756519 283 57-62
3760116 283 60-64
3767460 283,327 60-64
3767462 327 62-67 161 / 65cc Ports
3767465 283 59-61
3767754 283 59-61 Power Pack Heads
3767792 283 60-64
3770126 327 69
3774682 283, 327 60-64
3774684 327 62-64 Passenger Car and Truck
3774692 283 60-61 Corvette
3774692 283 58-64 Passenger or Power Pack Head
3782461 327 64-66 Double Hump or Camel Hump 161 / 62cc Ports
3782461X 327 60-63 Larger Intake Runners, 172 / 64cc Port (other notes suggest Fuel Injection)
3782870 327 62-37
3789817 327 62-67
3789935 283 57-62
3790721 283 64-67
3792563 327 65-67
3795896 283 63-65 Power Pack Heads
3795896 327 62-64 Corvette 250 HP 140 / 60cc Ports
3798996 327 63-67
3814480 283, 327 60-67
3814482 327, 350 62-67 75cc Low Compression Heads
3817680 283, 327 63-67
3817681 327, 350 62-67
3817682 283 61-62
3836839 265 55
3836842 283,327 57-67
3837064 265, 283 56-62
3837065 265 55-56 Truck
3837739 283 57
3848720 283 57-58
3849852 283 57-67
3849935 283 65-67
3852174 327 62-64
3854520 283, 327 62-67 140 / 60cc Ports
3870064 265, 283 56-62
3870065 265 55-56 Truck
3876775 283, 327 210 HP Camaro Accessory Bolt Holes on one end only
3884520 283, 327 60cc
3890462 302, 327 350 Camel Hump or Double Hump 161 / 165cc Intake Port
3901068 350 285HP Crate Engine 64cc, 72º Intake Bolt Angles
3911032 307, 327 68 Without Accessory Bolt Holes
3912264 283 58-62
3912265 283 63-64
3912311 327 67
3912313 327 65-67
3917290 307, 327, 67-68 142 / 59cc Ports
3917291 302, 327, 350 Camel Hump or Double Hump 161 / 65cc Ports
3917292 327 350 68 Corvette Camel Hump or Double Hump
3917293 307, 327 75cc 144 / 58cc Ports
3927185 307, 327 69cc 69-70
3927186 302, 350 Camel Hump or Double Hump 63cc Chamber 161 / 65cc Ports
3927187 350 69-70 Camel Hump or Double Hump 64cc
3927188 307, 74cc
3928455 302, 327 68
3928494 327, 350 68
3928495 327 68
3931633 307 68-72
3931635 250 68-76
3931637 327 68-69
3931638 327 68 Truck
3932441 350 76cc 161 / 165cc Intake Port
3932441X 350 80cc 1.94 / 1.5 Valves 161 / 65cc Port
3932441X 400 80cc 1.94 / 1.6 Valves 161 / 65cc Intake Port
3932454 307 69
3946812 350 69
3946813 350 69-70 138 / 72cc Ports
3747041 302, 350 64cc
3951598 400 70 76cc
3964286 350
3970126 327, 350 67-70
3973414 350 70 LT-1 64cc Camel Hump or Double Hump Heads
3973487 350 71-76
3973487 350 LT-1 75cc 161 / 165cc Intake Port
3973487X 350 75cc Larger Intake Ports
3973493 400 71 76cc
3986316 350 71 Corvette 76cc
3986336X 350 76cc
3986388 307, 350 68-76
3986339 307, 350 71 75cc
3986339X 307,350 75cc
3991492 350 70 LT-1 64cc Straight Plugs Camel Hump or Double Hump
3991492 70 Straight or Angle Plugs 64cc 157 / 62cc Ports
3998916 350 LT-1 76cc Screw in Rocker Arm Studs
3998920 350 72-73
3998991 307,350 73 75cc Hardened Valve Seats
3998991 307, 350 72-73 75cc
3998993 307, 350 73 75cc Hardened Valve Seats
3998993 307, 350 72-73 76cc 164/64cc Ports
3998993 350 Crate Mexico Made 159/64cc Ports
3998993 350,400 73 76cc Hardened Valve Seats
3998997 350, 400 72-73 76cc
3998997 305, 350 161 / 165cc Intake Port Hardened Valve Seats
4079261 350 75
10033867 Pontiac Aluminum Racing Heads Angle Plugs 62cc - 196cc Intake Port 23º 2.10 -1.625 Valves
10045434 Pontiac Aluminum Racing Heads Angle Plugs 55cc Raised Intake Runner 15º Roll Over
10051101 Bow Tie Aluminum Angled Plugs 55cc Raised Intake Runner 196cc Intake Port
10088113 350 88-93 Corvette Aluminum Angled Plugs 58cc 1.94 -1.5 valve Super Light Weight
10106178 350 90 LT-5 and ZR-1 Dual Over Head Cam 32 Valve Passenger's Side
10106179 350 90 LT-5 and ZR-1 Dual Over Head Cam 32 Valve Driver's Side
10110810 350 93 Generation I
10128374 350 Generation II LT-1 53cc Angled Plugs Corvette Aluminum Reverse Flow Cooling System 168-175 cc Intake Port
10134352 Bow Tie Low Port Aluminum with 18º Angled Plugs 45cc 223cc Intake Ports
10134363 Bow Tie High Port Aluminum with 18º Angled Plugs 45cc 210cc Intake Ports
10134363 Bow Tie High Port Aluminum with 18º Angled Plugs 60cc 215cc Intake Ports
10134363 Bow Tie High Port, Aluminum with 18º Angle Plugs 50cc 250cc Intake Ports CNC Machined 2.15 / 1.625 Valves
10134363 Bow Tie High Port Aluminum 18º Angle Plugs 65cc 250cc Intake Ports CNC Machined 2.15 / 1.625 Valves
10134363 Bow Tie High Port Aluminum 15º Angle Plugs 36cc 223cc Intake Ports
10174389 350 90-95 LT-5 and ZRI Dual Over Head Cam 32 Valve Driver's Side
10174390 350 91-95 LT-5 and ZRI Dual Over Head Cam 32 Valve Passenger's Side
10185040 Symmetrical Port splayed valve Aluminum 45cc 263cc Intake Port 1st design
10185040 Symmetrical Port splayed valve alm, 45cc, 263cc intake port, 2nd. design
10205245 350 93 Generation II LT-1 Aluminum Reverse Flow Cooling System 168-175 Intake Port
10207643 350 94-96 Generation II LT-1 Aluminum Reverse Flow Cooling System
10225121 350 94-95 LT-1 and ZR1 Dual Over Head Cam 32 Valve Driver's Side
10225122 350 94-95 LT-1 and ZR1 Dual Over Head Cam 32 Valve Passenger's Side
10239902 350 96- Generation II LT-4 Aluminum Reverse Flow Cooling System
10239906 350 Vortec 5700 L-31 64cc Heart Shaped Chamber 1.94 / 1.5 170cc Intake Ports
14010201 305 84
14011034 Bow Tie Phase 2 Iron Angle Plugs 64cc 2.02 / 1.6 184cc .080 Taller Intake Ports
14011039 350 High Performance Replacement Aluminum
14011049 Bow Tie Phase 6 Aluminum Angled Plugs 55cc 2.02 / 1.6 or 2.1 / 1.65, 180cc Intake Ports
14011083 350 300 HP Crate Engine 64cc 90º Manifold Bolt with Hardened Valve Seats
14011083 350 87-95 64cc Center Bolt Valve Covers 72º Manifold Bolt
14014415 267, 305 80-85
14014416 305 80-85 High Output 58cc 1.84 / 1.5 165/59cc Ports
14022601 267, 305 80-85 High Output 58cc 1.84 / 1.5
14022801 305 80-85
14071114 350 80-85
14079261 350 86
14096217 350 285 HP Crate Engine 1.94 / 1.5, 72º Intake Bolts 64cc Center Bolt Valve Covers
14101081 305 87-88 Camaro Center Bolt Valve Covers
14101083 350 285 HP and 300HP Crate Engine 1.94 / 1.5 72º Intake Bolts
14101128 350 86-87 Aluminum Corvette with Angled Plugs 58cc
14102187 305 87-91 High Output 1.85 / 1.5 58cc
14102191 305 87-95 350 Center Bolt Valve Covers
14102193 305, 350 87-95
24502559 Bow Tie Aluminum Mirror Ports
More Castings
33417369 350 Generation I Crate Engine Mexico Made 76cc 1.94 / 1.5 Flange Valve Cover Heavier Casting
366298 Bow Tie, Aluminum Billet Main Caps 3.398" Bore with Sleeves Two Piece Rear Main Seal
366299 Bow Tie Aluminum Nodular Iron Splayed Main Caps 4.00" Bore
389257 302 67 2 Bolt Main Caps
393288 283 65-67 2 Bolt Main Caps
460703 350 78 4 Bolt Main Caps
460776 305 78-79 2 Bolt Main Caps
460777 305 78-79 2 Bolt Main Caps
460778 305 78-79 2 or 4 Bolt Main Caps Some Canadian Assembled Heavy Duty Truck Blocks Have 4 Bolt Main Caps
471511 267 79-82 2 Bolt Main Caps
3556519 283 58-61 2 Bolt Main Caps
3703524 265 55 2 Bolt Main Caps No Oil Filter (This Casting Design Was Short Lived For Obvious Reasons)
3720991 265 56-57 2 Bolt Main Caps
3731548 265 57 2 Bolt Main Caps No Side Motor Mounts (This Engine Mount Was Attached to the Front)
3731548 283 57 2 Bolt Main Caps No Side Motor Mounts (This Engine Mount was Attached to the Front)
3737739 283 58-64 2 Bolt Main Caps
3756519 283 58-62 2 Bolt Main Caps
3782870 327 62-67 2 Bolt Main Caps
3789817 283 62-64 2 Bolt Main Caps
3789817 327 62-67 2 Bolt Main Caps
3789935 283 61-67 2 Bolt main Caps
3790721 283 62-64 2 Bolt Main Caps This Engine was Designed for the Chevy II and had a Recessed Oil Filter Boss
3790721 327 65-66 2 Bolt main Caps This Engine was Designed for the Chevy II and had a Recessed Oil Filter Boss
3791362 327 62-67 2 Bolt Main Caps This Engine was Designed for the Chevy II and had a Recessed Oil Filter Boss
3792563 327 65 2 Bolt Main Caps
3792582 283 64-65 2 Bolt Main Caps
3794226 283 58-63 2 Bolt Main Caps
3794460 327 62-64 2 Bolt Main Caps
3830944 327 63 2 Bolt Main Caps
3834810 283 64-66 2 Bolt Main Caps
3834812 283 62-63 2 Bolt Main Caps
3837739 283 58-62 2 Bolt Main Caps
3849852 283 57-66 2 Bolt Main Caps
3849935 283 65-67 2 Bolt Main Caps
3858174 327 64-67 2 Bolt Main Caps
3858180 327 64-67 2 Bolt Main Caps
3858618 350 68-76 2 Bolt Main Caps
3862194 283 65-67 2Bolt Main Caps This Engine was Designed for the Chevy II and had a Recessed Oil Filter Boss
3862812 283 62-64 2 Bolt Main Caps
3892657 302 67 2 Bolt Main Caps Camaro Z-28
3892657 327 67 2 Bolt Main Caps
3892657 350 67 2 Bolt Main Caps Camaro
3896944 283 66-67 2 Bolt Main Caps
3896948 283...66-67...2
3903352 327.....67....2
3914636 307.....68....2
3914638 307.....68....2
3914653 307...68-73...2
3914660 327.....68....2
3914678 302.....68....2...Z-28 Camaro
3914678 327.....68....2
3914678 350.....68....2
3931174 307.....68....2...Truck
3932371 307...69-73...2
3932373 307...68-73...2
3932386 302.....69....4...Z-28 Camaro
3932386 327.....69....2
3932386 350.....69....4
3932388 327.....69....2
3932388 350.....69....2 or 4
3933180 327...68-69...2
3951509 400...70-71...4
3951509 400...74-80...2
3951511 400...70-73...4...Some replacement blocks had 2-bolt main caps
3956618 302.....69....4...Z-28 Camaro
3956618 327...68-69...2
3956618 350.....69....2 or 4
3956632 307.....69....2
3959512 327...62-67...2...Was also used for some "CE" replacement blocks
3959532 283...64......2...Used for some "CE" replacement blocks
3959538 327...........2...Chevy II recessed oil filter boss, Used for some Chevy II "CE" replacement blocks
3970010 302.....69....4...Z-28 Camaro
3970010 327.....69....2...Trucks and industrial
3970010 350...69-80...2 or 4
3970014 350...70-76...2 or 4
3970020 307...69-73...2
3970024 307...69-73...2
4715111 305.....80....2
6259425 350...69-76...2
140029 350...80-84...2
330817 400...72-80...2
355909 262.....75....2
355909 305...76-79...2
360851 262...75-76...2...Monza V-8
361979 305...77-79...2 or 4, some Canadian assembled heavy duty blocks have 4-bolt main caps
366245 350...78-79...4...Bowtie
366286 4...Bowtie, siamesed straight nodular iron main caps, 2-piece seal, 4.00-4.150" bores, 2.45" main journals
10036033...350...........4...Goodwrench crate motor, 2-piece rear seal, "Hecho en Mexico"
10046164...305.....86....2
10049804.................4...Aluminum, Pontiac Super Duty version of Gen.I SBC, 4.00" bore, 350 mains, 2-piece rear seal, splayed caps, GTP race block
10051182.................2 or 4...Bowtie, 3.75"-4.30" bores, 1 or 2-piece rear seal
10051184.................4...Bowtie, 4.00"-4.155" bores, 1 or 2-piece rear seal
10054727...350...86-up...2 or 4...one piece rear seal, some "Made in Canada"
10066036...350...........2 or 4...Target Master/Goodwrench crate motor, 2-piece rear seal, "Hecho en Mexico"
10066038...350.....92....4...Goodwrench crate motor, 2-piece rear seal, "Hecho en Mexico"
10090511...350.....90....2...LT-5, ZR1 Vette, 375hp
10125327...350...92-up...2 or 4...Gen.II LT-1, reverse flow cooling
10125327...350...96-up...2 or 4...Gen.II LT-4, reverse flow cooling
10134398.................4...Bowtie, Aluminum, 4.125" bore, 2.65" main journals
10134996.................4...Bowtie, Aluminum, 4.125" bore 2.65" main journals
10153558...350...91-92...4...LT-5, ZR1 Vette, 375hp
10168588...265...94-96...2...L99, Gen.II, 4.3 Liter V-8, Caprice, reverse flow cooling
10199001...350...93-95...4...LT-5, ZR1 Vette, 405hp
10243878...305...96-98...2...Vortec truck, roller cam, one-piece rear seal
10243880...350...95-00...2 or 4...Vortec truck, Gen.I crate motors and "ZZ4", roller cam, one piece rear seal
12550592...350...97-up...crossbolted block, Gen.III, "LS1", aluminum
12551358.........99-up...Gen.III, 4.8L or 5.3L, cast iron, truck
12551364...364...98-04...crossbolted cast iron Gen. III, 6.0L, truck
12559378...350...99-up...crossbolted block, Gen.III, "LS1", aluminum
12559846...350...98-up...crossbolted block, Gen.III, "LS1", aluminum
12560621...350...98-up...crossbolted block, Gen.III, "LS1", aluminum
12560626...350...99-up...crossbolted block, Gen.III, "LS1", aluminum
12560629...350...99......crossbolted block, Gen.III, "LS1", aluminum
12561168...350...01-up...crossbolted block, Gen.III, "LS1", aluminum
12562174...350...98-up...crossbolted block, Gen.III, "LS1", aluminum
12568952...364...05-up...crossbolted block, Gen.III, 6.0L, aluminum, LS2
12566910...325...04-up...crossbolted block, Gen.III, 5.3L, aluminum, SSR truck
12571048...325...04-up...crossbolted block, Gen.III, 5.3L
12573581...364...98-04...crossbolted cast iron, Gen.III, 6.0L, truck
12577184...364...98-04...crossbolted cast iron, Gen.III, 6.0L, truck
12577396.........02-up...Gen.III, 4.8L or 5.3L, cast iron, truck
14010201...305...80-85...2
14010202...305...80-85...2
14010203...305...80-85...2
14010207...350...80-85...2 or 4
14010209...350...80-85...2 or 4
14010280...267...79-82...2
14011064...350...83......4
14011148...350...87-89.......Roller cam, one-piece rear seal
14016376...267...79-82...2
14016379...350...77-79...2 or 4
14016381...305...80-84...2
14016382...305...79-84...2
14016383...305...80-85...2...Truck
14079287...350...86-90.......Truck
14088526...350...87-89.......Roller cam, one-piece rear seal
14088548...350...86-88...2 or 4
14088551...305...86-87...2...one-piece rear main seal
14093627...305...87-94...2...Roller or flat tappet cam, one-piece rear seal
14093638...350...87-95...2 or 4...Roller or flat tappet cam, one-piece rear seal
14094766...305...86-up...2...One-piece rear seal
14101147...305...85-up...2
14101148...350...86-90...4...One-piece rear seal
14102058...305...87-91...2...Roller cam, one-piece rear seal
22551656.................4...Rocket block, 4.00"-4.190" bores, 2.45" main journal sizes, splayed caps, dry sump, 2-piece rear seal, 9.025" deck
330545.....73......350..........76cc chamber, 2.02/1.60
333881.....74-75...350..........76cc chamber, 2.02/1.60
333882.....74-80...350/400......76cc chambers
340292.....70's.......Over the counter, angle plug, 64cc chamber
354434.....75-79...262/267/305...60cc chambers
358741.....76-79...305
376445.....77-85...350..........76cc chamber, small valves
376450.....75-81...262/267/305..6 or 7 exhaust bolt holes, 60cc chamber
462614.....77-79...305..........60cc chamber
462624.....75-86...350/400......76cc chamber, 1.72/1.5, 1.94/1.5 or 2.02/1.6 valves
458642.....75-84...350..........350
468642.....76-up...350/400
471513.....79......267/350
517513.....79......267/350
1816887....63......283..........Made in "Canada", GMC HD truck
3636839....55......265
3703523....55......265
3713358....55-56...265
3713569....55-56...265
3725306....56......265
3731539....57......283..........283 HP FI
3731544....57-61...283
3731554....57-62...283
3731556....57......283..........Truck, Made in Canada
3731762....56......265..........Vette, 2x4 carbs
3737775....62-67...283/327
3740997....57......283..........1x4, 2x4 & FI (exc.-283hp)
3743056....58......283
3743096....62-67...327..........GMC Truck
3747363....57-61...283
3747460....59-67...283/327......70cc chambers
3748770....58......283
3748772 58-61...283
3755537 57-62...283
3755539 58-62...283
3755549 57-62...283
3755550 59......283
3755585 62-67...327..........GMC Truck
3767460 59-60...283
3767462 62-67...327
3767465 59-61...283
3767754 59-61...283..........60cc chambers
3767792 60-64...283
3774682 60-64...283/327......70cc chambers
3774684 62-64...327..........75cc chambers
3774692 58-64...283..........60cc chambers
3782461....64-66...327......Camel hump,no accessory holes,160/62cc port volumes,62cc chamber
3782461X...60-63...283/327..Camel hump,no accessory holes,larger 172/64cc port volumes, 62cc chamber
3795896....63-65...283......60cc chamber
3795896....62-64...327......60cc chamber
3798996....63-67...327
3814480....60-67...283/327..70cc chambers, 1.72/1.5 valves
3814482....62-67...283/327/350..75cc chambers
3817680....63-67...283/327
3817681....62-67...327
3817682....61-62...283
3836839....55......265
3836842....57-67...283/327
3837064....56-62...265/283
3837065....55-56...265..........Truck
3848720....57-58...283
3876775....60-67...283/327......75cc chamber
3884520....60-67...283..........Some marked "Made in Canada", 60cc chamber, also used by Studebaker
3884520....62-67...327..........Some marked "Made in Canada", 60cc chamber, also used by Studebaker
3890462....66-67...302/327/350..Camel hump,no accessory holes,64cc chamber
3901068....87-up...350..........Crate motor, 285hp, 64cc chamber
3911032....68......307/327......70cc chamber
3912264....58-62...283
3912265....63-64...283
3912311....65-67...327
3912313....65-67...327
3917290....67-68...307/327
3917291....67-68...302/327/350..Camel hump,no accessory holes,64cc chamber
3917292....68......327/350......Camel hump,64cc chamber
3917293....67-68...307/327......75cc chambers
3927185....69-76...307/327/350..70cc chambers
3927186....69-70...302/350......Camel hump,64cc chambers,accessory holes
3927187....69-70...350..........Camel hump,64cc chambers,accessory holes
3927188....69......327..........74cc chambers
3927188....70......307..........74cc chambers
3931633....68-73...307
3931635....68-76...350
3931638....68......327..........Truck
3932441....69-70...350..........76cc chambers
3932441X...69-70...350/400......80cc chambers
3932454....69-73...307
3932454....69-79...350..........Truck
3946812....69......350
3946813....69-79...350..........Truck
3947040....68......327.........."Right angle" casting identifier, 64cc chambers, good HP head,
used in trucks, no accessory holes
3947041....69-70...302/350......"Right angle" casting identifier, 64cc chamber, accessory holes, good HP head
3947041X...69-70...302/350......"Right angle" casting identifier, 64cc chamber, 165cc intake port, accessory holes, good HP head
3951598....70......400..........76cc chambers
3964286............350
3965742....70......350..........over the counter, angle plug
3970126....67-71...327/350
3973370....69-70...350..........over the counter in US, Canadian 350/300hp production use in Pontiac, 64cc, straight or angle plug
3973414....70......350..........LT1-370hp, Camel hump, 64cc chamber
3973487....71-72...350..........used on 71-72 350 LT1, 75cc chamber
3973487X...71-72...350..........75cc chamber
3973493....71-72...400..........76cc chamber
3986316....71......350..........76cc chamber
3986336....71......350..........76cc chamber
3986336X...71......350..........76cc chamber
3986339....71......307/350......74cc chamber
3986339X...71......307/350......74cc chamber
3986388....68-76...307/350
3991492....70......350..........LT1,Camel hump,accessory holes,64cc, straight plug
3991492....70-up................over the counter,Camel hump,64cc, straight or angle plug
3998916....72......350..........also used w/'72 350 LT1,big valves, screw in studs,76cc chambers
3998920....72-73...350
3998991....72-73...307/350......75cc chambers
3998993....72-73...307/350......75cc chambers
3998993....current..350.........Goodwrench crate motors,"Hecho en Mexico",75cc chambers
3998997....72-73...350/400......76cc chambers
3998997....78-84...305/350......76cc chambers
4079261....75......350
10033867........................Aluminum,over the counter Pontiac 23' head,62cc,angle plug, 196cc intake port
10045434........................Over the counter Pontiac 15' head
55cc, angle plug, raised runner
aluminum, "roll over" head
10051101........................Bowtie, aluminum, 55cc, angle plug
raised runner, 196cc intake port
10065202...87-95...350..........Truck
10065203...87-95...350..........Truck
10065204...87-95...350
10065205...87-95...305
10065206...87-95...350
10065207...87-95...305
10088113...88-up...350..........Aluminum, 58cc, angle plug, raised
"D" port exhaust, 1.94"/1.5" valves
10093328........................Over the counter, Pontiac 15' head
aluminum,224cc ports, 61cc chambers,
"roll over" head
10106178...90......350..........LT5, ZR1, DOHC, 32-valve,
pass. side, aluminum
10106179...90......350..........LT5, ZR1, DOHC, 32-valve,
drvs. side, aluminum
10110810...91-up...350..........Gen. 1, 65cc chambers
10120928...87-95...350
10125320...94-96...350..........Gen.II LT1, cast iron version, used
on "9C1" Police package, Impala SS,
Cadillac Fleetwood, Buick Roadmaster
reverse flow cooling
10128374...92-up...350..........Gen.II LT1, 53cc, angle plug,
aluminum, reverse flow cooling,
175/68cc ports
10134352........................Bowtie, 45cc, angle plug, "low"
port, 223cc intake port, aluminum,
18' race head
10134363........................NOTE: This casting # has been used
in many different versions of this
aluminum 18' and 15' Bowtie race head.
Different chamber volumes, port
volumes, port locations, valve sizes,
etc. were used. Check this casting
carefully to determine which features
it may have. There are at least 6
different versions as of 11/99.
10147898...95-98...350..........Gen.I crate motor
10159550...87-95...350
10159551...87-95...305
10159552...87-95...350
10159553...87-95...305
10174389...91-94...350..........LT5, ZR1, DOHC, 32-valve,
drvs. side, aluminum
10174390...91-95...350..........LT5, ZR1, DOHC, 32-valve,
pass. side, aluminum
10185040........................Bowtie, aluminum, 45cc chambers,
1st version, symmetrical ports,
263cc intake ports, splayed valves
10185040........................Bowtie, aluminum, 45cc chambers,
2nd version, symmetrical ports,
240cc intake ports, splayed valves
10205245...93......350..........Gen.II LT1, aluminum, reverse
flow cooling, 175/68cc port volumes
10207643...94-96...350..........Gen.II LT1, aluminum, reverse
flow cooling, 175/68cc port volumes
10208890...94-96...265..........Gen.II, L99, 4.3 Liter V-8, cast iron, reverse flow
10215339...97......350..........Gen.III, LS1, aluminum, 68cc
10225121...94-95...350..........LT5, ZR1, DOHC, 32-valve,
drvs. side, aluminum
10225122...95......350..........LT5, ZR1, DOHC, 32-valve,
pass. side, aluminum
10239902...96-up...350..........Gen.II LT4, aluminum, reverse
flow cooling, 195cc port, 54.4cc chamber, angle plug
10239906...96-up...350.........."Vortec 5700", "L31", 64cc chamber,
170cc intake port, 1.94"/1.5" valves
12367712...99-up................"Fast Burn", aluminum, 210cc intake,
port, 2.00/1.55 valves, 62cc chamber
12367713...99-up................"Fast Burn" used on ZZ430 crate motor, aluminum, 210cc intake
port, 2.00/1.55 valves, 62cc chamber
12480005...2000.................LS1 "GTZ", aluminum, 38cc, 2.125"/1.625" valves, angle plug
12480011...97-up................Bowtie "SB2.2", aluminum, 2nd
version of "SB2", 48cc chambers,
"mirror ports", revised valve
angles & plug location
12506450...87-95...350
12509859...87-94...305
12516852...87-95...350
12529742...95-96...265..........Gen.II, "L99", cast iron
12551561...96......350..........Gen.II, "LT1", aluminum
12552520...97-up...305..........Vortec, truck
12554290...94-96...350..........Gen.II, "LT1", cast iron version, used
on "9C1" Police package, Impala SS,
Cadillac Fleetwood, Buick Roadmaster
reverse flow cooling
12554291...95-96...265..........Gen.II, "L99", cast iron
12555690...96......350..........Gen.II, "LT4", aluminum
12556743...99......325..........Gen.III, 5.3L, aluminum, truck, van
12558059...97......305..........Vortec, truck, 1.84"/1.5" valves
12558062...98......350..........L31 Vortec, truck, 64cc chambers, 1.94/1.5, 170cc intake port
12558806...97-98...350..........Gen.III, "LS1", aluminum, 68cc
12559853...99-up...350..........Gen.III, "LS1", aluminum, 68cc
12559862...99-00................Gen.III, aluminum 4.8/5.3L
12559895...00-up...325..........Gen.III, aluminum, Vortec 5.3L
12561706...01-04................Gen.III, 5.3L, aluminum
12561873...99-01...364..........Gen.III, 71cc, iron
12562317...01-04...364..........Gen.III, 71cc, aluminum
12564241...00-up...350..........Gen.III, "LS1", aluminum, 68cc
12564243...01-up...350/364......Gen.III, "LS6", "LS2", aluminum
12572035...01-04...364..........Gen.III, 6.0L, aluminum, 71cc
14008856...79-81...267
14010201...82-85...305
14011034........................Bowtie, cast iron, 64cc chambers,
184cc port volume, angle plug,
"Phase II" head
14011049........................Bowtie, aluminum, 55cc chambers,
angle plug, 180cc ports, "Phase 6"
14011083...55-86...350..........Crate motor for years indicated.
285/300hp, 64cc chambers, 1.94"/1.5" valves
14014415...80-85...267/305
14014416...80-86...305..........1.84"/1.5" valves, 58cc chambers
14014440...80......305..........1.84"/1.5" valves
14019821...80-86...350
14019924...79-81...267
14019926...80-86...350
14010516...80-86...350
14020517...80......350
14020555...81......305
14020556...81......350
14022056...85......350
14022206...80......350
14022301...80-86...305
14022601...80-86...267/305......1.72"/1.5" or 1.84"/1.5" valves, 53cc chambers
14022801...80-86...305
14024816...........350..........76cc chambers, 1.94/1.5 valves, Gen.I crate motors
14034806...78-82...267
14034807...78-86...305
14034808...80-86...350
14034808...96-up...350..........76cc chambers, 1.94"/1.5" valves, Gen.I Goodwrench crate motors
14034810...80-86...350..........Truck
14034811...80-86...350..........Truck
14039121...81-86...305..........Truck
14039122...81-86...305..........Truck
14071114...80-86...350
14075381...80-86...350..........Truck
14079261...86......350
14085844...80-86...350..........Truck
14085963...86......350
14088526...........350..........Gen.II, LT1, aluminum
14089119...86-88...350
14094093...86-88...350
14096217...55-86...350 Crate285hp/300hp, 64cc chambers, 72' or 90' center intake manifold bolt angles
14101081...87-95...305
14101083...87-up...350..........Gen.I, also used on crate motors, 285 or 300 hp, 64cc
chambers, 72' center manifold bolt
angles
14101128...86-87...350..........Aluminum, 58cc, angle plug
14102187...87-91...305..........1.84"/1.5" valves
14102191...87-up...350
14102193...87-up...305/350......1.94"/1.5" valves
22542525........................Dart/Olds/Chevy aluminum, 14'or 17' race head.
24502559...96-97................Bowtie, "SB2", 1st version,
"mirror ports", aluminum, 196cc port, CNC version 280cc port, 38cc chamber
25500141........................Buick/Chevy aluminum, 10' race head,
42cc chambers, symmetrical ports,
235cc intake port volumes,
2.1"/1.625" valves
25534351C..04-up................Gen.I Bowtie, cast iron Vortec head, 175/65cc ports, 2.00/1.55 valves, "small port head"
25534371C..04-up................Gen.I Bowtie, cast iron Vortec head, 206/77cc ports, 2.00/1.55 valves, "large port head"
33417369...90-up...350..........Gen.I Goodwrench crate motor,"Hecho en Mexico", 76cc
World Products Cast Iron Heads ( by part numbers )
4351 67cc, 162cc intake port
4350 76cc, 162cc intake port
4205 58cc, 162cc intake port, 305 torquer
4256 67cc, 172cc intake port, torquer
4257 76cc, 172cc intake port, torquer
Trick Flow Twisted Wedge Alm ( by part number )
31400001 64cc, 2.02-1.6, screw in studs, guide plates,185cc intake ports, candid valve angles
31400002 same 01, except with 72º intake bolts for 87-up
31400003 same 01, except with center valve cover bolt, 86- up
31400005 same 01, except 1.440 valve springs
31400006 same 01, except, with 72º intake bolts, old style valve covers
Edelbrock Alm. Heads
6061 Performer RPM Bare head, angle plug, 70cc
6063 Performer RPM Bare head, straight plugs, 70cc
6071 Performer RPM Same as 6061 exc. complete
6073 Performer RPM 70cc, 170cc intake port, straight plug, complete
6075 Performer 65-up, 70cc, 2.02-1.6, screw in studs, guide plates, heat riser
6085 Performer 87-93, center bolt valve cover, 60cc
6087 Performer 87, center bolt valve cover, 60cc, 165cc intake port
7700 Vr. Jr. Race Heads, Bare, 71cc, 212-267cc port, CNC Machined, 2.08-1.6,
7720 Same as 7700 exc complete
Big Blocks
058 241/86 cc port
063 256/114 cc port
083 243/110cc port
215 256/114cc port
241 252/116cc port
280 256/114cc port
290 256/114cc port
290 262/115cc port small plug head
291 327/120cc port
340 320/120cc port
820 255/114cc port
840 326/120cc port
842 318/112cc port
990 323/127cc port
330864 396-454 70-81 Oval Port
330865 366-427 70-76 Truck HD Oval Port
336781 454 73-85 Oval Port
343771 366-454 68-85 Truck HD
343772 366-454 76-84 Truck HD Oval Port
346236 454 75-76 Oval Port
353049 400-402 70-76 Oval Port
473328 366 68-85 Truck HD Oval Port
3732791 348 58
3758379 348 59-61
3759256 348 58
3767738 348 59-61
3781147 348 60-61 Hi Perf
3795586 409 61 360HP
3814690 409 62-64 Hi Perf
3819333 348-409 62-65 Truck
3830817 409 63-65 340 HP
3837731 409 63 RPO Z11
3852583 409 65 400 HP
3856206 396 65 Oval Port
3856208 396 65 Corvette 425 HP Sq. Port
3856213 366 66-82 Oval Port
3856260 396 68
3872702 396-427 66 Oval Port
3873858 396, 427 66 Sq. Port
3876875 427 77-85 Truck Oval Port
3904390 396-427 67 Oval Port
3904391 396-427 67 Sq. Port
3904392 427 67 Sq. Port Almuminum L-88 & L-89
3904393 366 66-68 Truck Oval Port
3909802 396-427 67 Oval Port
3917215 396-427 68 Oval Port
3917219 366-427 68-85 Truck HD Oval Port
3919840 396-427 67-69 Sq. Port
3919842 396-427 68-69 L-88 & L-89 Alm
3931063 396-427 68-72 Oval Port
3933148 366-427 68-84
3933149 427 68-76 Truck
3946074 454 69-71 Alm. L-88, ZL-1, LS-6
3964290 400-454 70 Oval Port
3964291 402-454 70 Sq. Port L-78, LS-6
3965198 396 68-69 Oval Port
3975950 366-427 68-70 Truck Oval Port
3986133 366-427 68-85 Truck Oval Port
3986136 366-427 68-84 Truck Oval Port
3993820 400-454 71-72 Oval Port
3994026 454 71 LS-6 Sq. port
3999241 402-454 72 Oval Port
6272292 402-454 70-75 Oval Port
14092359 427 86-88 Truck Oval Port
14092360 454 85-88 Truck Oval Port
| Cyclinder Head Castings Information A Great Resource for Chevrolet Owners |
| We have a set of 461X Heads For Sale $800.00 Complete and off a running Motor 461heads@chevellebigblock.com |
