Head Casting #

Small Block V-8 Head Casting Numbers

(Use the "Find" option in your web browser to find the correct casting number)

Casting #

Year

Engine

Chamber Size/Notes
330545 73 350 76cc chamber, 2
333881 74-75 350 76cc chamber, 2
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
458642 75-84 350  
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
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 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, "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, 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, 194"/15" 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
10120928 87-95 350  
10125320 94-96 350 GenII LT1, cast iron version, usedon "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, 544cc 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"/1625" 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  
12551561 96 350 Gen II, "LT1", aluminum
12552520 97-up 305 Vortec, truck
12554290 94-96 350 Gen II, "LT1", cast iron version, usedon "9C1" Police package, Impala SS, Cadillac Fleetwood, Buick Roadmaster reverse flow cooling
12555690 96 350 Gen II, "LT4", aluminum
12558059 97 305 Vortec, truck, 184"/15" valves
12558062 98 350 L31 Vortec, truck, 64cc chambers, 194/15, 170cc intake port
12558806 97-98 350 Gen III, "LS1", aluminum, 68cc
12559853 99-up 350 Gen III, "LS1", aluminum, 68cc
12564241 00-up 350 Gen III, "LS1", aluminum, 68cc
12564243 2 350 Gen III, "LS6", aluminum
14008856 79-81 267  
14094093 86-88 350  
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 80-86 305 184"/15" valves, 58cc chambers
14014440 80 305 184"/15" 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 80-86 267/305 184"/15" valves, 58cc 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, 194"/15" valves, Gen
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  
14089119 86-88 350  
14094093 86-88 350  
14096217 55-86 350 Crate motor, 285hp/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 87-91 305 184"/15" valves
14102191 87-up 350  
14102193 87-up 305/350 1.94"/1.5" valves
24502559 96-97   Bowtie, "SB2", 1st version, "mirror ports", aluminum, 196cc port, CNC version 280cc port, 38cc chamber
25500141     Buick/Chevy aluminum 10' head, 42cc chambers, symmetrical ports, 235cc intake port volumes, 2.1"/1.625" valves
33417369 90-up 350 Gen I Goodwrench crate motor, "Hecho en Mexico", 76cc

 

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