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Chevy Head Casting Number

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Chevy Head Casting Number
Big Block
348-409
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Chevy V-8 Small and Big Block Head Casting Numbers and Data

There is a lot of misinformation on the internet about these numbers. We have taken the time to verify the data as much as possible. There still may be errors. Please lets us know if you find one.

Small Blocks

Number C.I.D. Year Intake Exhaust CC Description
330545 307 71-73 1.72 1.5001 74
330545 350 73 2.02 1.60 76
330862 400 71-73 1.94 1.5001
333881 350 74-75 2.02 1.60 76
333882 350,400 74-80 1.94 1.5 76
340292 350 73-80 2.02 1.6 64 "Turbo", Over counter angle plug
354434 262,267,305 75-79 1.72 1.3 60
358741 305 76-79 1.72 1.5
367450 262,305 75-76 1.72 1.3
376445 350 77-85 1.72 1.5001 76
376450 262,267,305 75-81 60 6 or 7 Exhaust Bolt Holes
376495 350 69-79
399380 400 70-73
458642 350,400 75-84
460703 350 78-80
462614 305 77-79 60
462624 350/400 75-86 1.72/1.94/2.02 1.5/1.5/1.6 76
468642 350 76-83 1.94 1.5 Small spark plugs
471513 267,350 79
517513 267/350 79-82 1.72 1.3
1816887 283 63 Canada, GMC HD Truck
3030817 400 74
3238882 350 68-69
3297185 327 63-67 1.72 1.5001
3636839 265 55 1.72 1.5
3703523 265 55 1.72 1.5001 Vett
3713358 265 55-56 1.72 1.5
3713569 265 55-56 1.72 1.5
3714482 327 62-67 1.72 1.5
3720991 265 56-57
3725306 265 56-57 1.72 1.5
3727185 307 69-73 1.72 1.5001
3731262 265 56 1.72 1.5 2X4 carb, Vett
3731539 283 57 1.72 1.5 Vett, 283HP Fuel Injection
3731544 283 57-61 1.72 1.5
3731548 283 57-62
3731554 283 57-62 1.72 1.5
3731556 283 57 1.72 1.5 Canada, Truck
3731762 265 56 1.72 1.5001 2X4 carb, Vett
3737465 283 60-61 1.72 1.5
3737739 283 57-62 Vett, Fuel Injection
3737775 283,327 62-67 1.72 1.5
3740997 283 57 1.72 1.5 1X4 or 2X4 or FI
3743056 283 58 1.72 1.5
3743096 327 62-67 1.72 1.5 GMC Truck
3747363 283 57-61 1.72 1.5
3747460 283,327 59-67 70
3748056 327 62-67 1.72 1.5001
3748720 283 57-58 1.5
3748770 283 57-62 1.72 1.5 1X4 and 2X4 carb, FI Vett, X58, Stagger VC bolts
3748772 283 58-61 1.72 1.5
3755537 283 57-62 1.72 1.5
3755538 283 59 1.72 1.5001
3755539 283 58-62 1.72 1.5 Stagger VC bolts
3755549 283 57-62 1.72 1.5
3755550 283 57-62 1.72 1.5 Vett, Stagger VC bolts
3755585 327 62-67 1.72 1.5 GMC Truck
3756519 283 57-62
3760116 283 59 1.72 1.5
3767460 283 59-60 1.72 1.5 68
3767462 327 62-67 1.94 1.5 65
3767465 283 59-61 1.72 1.5001
3767754 283 59-61 1.72 1.5 60 Power Pack
3767792 283 60-64 1.72 1.5
3770126 327 67-70 1.94 1.5
3773012 265 55 1.72 1.5001
3774634 327 64-67
3774682 283,327 60-64 1.72 1.5 70
3774684 327 62-64 1.72 1.5 75 Passenger, Truck
3774690 283
3774692 283 58-64 1.72 1.5 60
3782461 327 64-66 1.94 1.5 62 Double (Camel) Hump, No Accessory Holes
3782461X 283/327 60-63 1.72 62 Double (Camel) Hump, No Accessory Holes
3782870 327 62-67
3789817 327 62-67
3789935 283 57-62
3790721 283 64-67 1.72 1.5
3792563 327 65-67 1.72 1.5
3795896 283,327 62-67 1.72 1.5 60
3798996 327 63-67 1.72 1.5
3814462 350 67 1.94 1.5001
3814480 283,327 60-67 1.72 1.5 70
3814482 283,327 62-67 1.72 1.5001 75
3817680 283,327 63-67 1.72 1.5
3817681 327 62-67 1.72 1.5
3817682 283 61-62 1.72 1.5
3836839 265 55-56 1.72 1.5
3836842 283,327 57-67 1.72 1.5
3836924 283 63-64 1.72 1.5001
3836942 283 58-62 1.72 1.5001
3837063 283 58-62 1.72 1.5001
3837064 265,283 56-62 1.72 1.5
3837065 265 55-56 1.72 1.5 Truck
3837739 283 57 1.72 1.5
3837775 283 62-67 1.72 1.5001
3848720 283 57-58 1.72 1.5
3849820 327 65 1.72 1.5001
3849852 283 57-67
3849935 283 65-67 1.72 1.5
3852174 327 62-64 1.72 1.5
3854520 283,327 62-67 172 1.5 60
3855961 350 68-76 1.72 1.5
3867802 283 57-60 1.72 1.5
3870064 265-283 56-62
3870065 265 55-56 Truck
3873064 265 56-57 1.72 1.5001
3876132 327 62-67 1.94 1.5
3876487 350 71-73 1.94 1.5001
3876775 283,327 60-67 1.72 1.5 75 Camaro 210HP, Acc. holes on one end only
3884520 283,327 60-67 1.72 1.5 60 Some made in Canada, Also used by Studebaker
3890462 302,327,350 66-67 2.02 1.6 64 Double (Camel) Hump, No Accessory Holes
3891462 327 62-67 1.94 1.5001
3901068 350 87+ 64 Crate Motor 285HP, 72 degree intake bolt
3911011 327 68 1.72 1.5001
3911032 307,327 68-69 1.72 1.5 70 No acc. holes
3912264 283 58-62 1.72 1.5
3912265 283 63-64 1.72 1.5
3912291 327 68-70 1.94 1.5001
3912311 327 65-67 1.94 1.5
3912313 327 65-67 1.72 1.5
3914636 307 68-73 1.72 1.5
3917264 302 67 2.02 1.6
3917290 307,327 67-69 1.72 1.5
3917291 302,327,350 67-69 2.02 1.6 64 Double (Camel) Hump, No acc. holes.
3917291 350 68-69 1.94 1.5 63.305
3917292 327,350 68 1.94 1.5 64 Double (Camel) Hump
3917293 307,327 67-69 1.72 1.5 75
3921175 327 66 2.02 1.6
3923441 350 68-72 1.94 1.5001
3927185 307,327,350 68-76 1.72 1.5 70
3927185 307,327,350 69-76 1.72 1.5 70
3927186 302,350 68-70 2.02 1.6 64 Double (Camel) Hump
3927186 350 70-72 2.02 1.6
3927187 350 69-70 2.02 1.6 64 Double (Camel) Hump
3927188 307,327,350 69-70 1.72 1.5 74
3928454 307 68 1.72 1.5
3928455 302 68 2.02 1.6
3928455 327 68 2.02 1.6
3928494 327,350 68 2.02 1.6
3928495 327 68 1.94 1.5
3931633 307 68-73 1.72 1.5
3931635 350 68-76 1.72 1.5
3931637 327 68-69 1.94 1.5
3931638 327 68 1.72 1.5 Truck
3931639 302 68 2.02 1.6
3932373 307 68-73 1.72 1.5
3932441 327,350 69-72 1.94 1.5 76
3932441X 350,400 69-70 1.94 1.5 80
3932454 307 69-73 1.72 1.5
3932454 350 69-79 Truck
3932882 400 76 1.94 1.5
3933148 350 68-73
3941174 327 68
3946812 350 69 1.72 1.5
3946813 350 68-79 1.72 1.5 Truck
3947014 350 69-70
3947040 327 68 64 Right Angle casting ID
3947041 302,350 68-70 1.94 1.5 64 Right Angle casting
3947041X 302,350 69-70 64 Right Angle casting
3951598 400 70-71 1.94 1.5 76
3964286 350 68-77 1.72 1.5
3965742 350 70 Over the counter angle plug
3970126 327,350 67-71 1.94 1.5
3973195 400 71-73
3973370 350 69-70 64 Over counter in US, Canadian 350/300HP Pontiac Production
3973414 327,350 64-70 2.02 1.6 64 LT1 350(370HP), Camel Hump
3973487 350 68-72 1.94 1.5 75
3973487 350 68-73 2.02 1.6 75 '71 LT1 350(330HP)
3973487X 350 71-72 1.94/2.02 1.5/1.6 75
3973493 400 72-76 1.94 1.5 76
3981462 302 67 1.94 1.5
3981462 327 62-67 1.94 1.5
3981462 350 67 1.94 1.5
3986316 350 71-72 76
3986330 350 69-79
3986336 350 71 76
3986336X 350 71 76
3986339 307 68-69 1.72 1.5 74
3986339 350 70-76 1.72 1.5 74
3986339X 307,350 71 1.72 1.5 74
3986388 307 68-71 1.72 1.5
3986388 350 72-76 1.72 1.5
3990462 327 62-68 1.94 1.5 Double Hump
3990462 327 62-68 2.02 1.6 Double Hump
3991492 350 69-72 2.02 1.6 64 LT1, Camel Hump, Service Only
3997417 307 71 1.72 1.5001 72 Passenger
3998916 350 72 1.94 1.5 76 '72 350 LT1
3998920 350 72-74 1.94 1.5
3998991 307 68-69 1.72 1.5 75
3998991 350 70-76 1.72 1.5 75
3998993 350 68-76 1.72 1.5 75 Truck
3998997 350,400 72-73 1.94 1.5 76
3998997 305,350 78-84 1.94 1.5 76
4079261 350 75
6259425 350 68-76 1.72 1.5
6259515 350 73 1.94 1.5001 76 Passenger
6260856 350 68-76 1.72 1.5
6272070 350 72-73 1.72 1.5001 76
8917291 350 68 1.94 1.5001 64
10033867 62 Alum.,Counter Pontiac 23', Angle Plug
10045434 55 Alum.,Counter Pontiac 15', Angle Plug, Raised Runner
10051101 55 Bowtie, Alum., Angle Plug, Raised Runner
10065202 350 82-95 1.94 1.5001 76 Truck
10065203 350 82-86 1.94 1.5001 76
10065204 350 82-95 1.94 1.5001 76 Truck
10065205 305 82-95 1.84 1.5001 58
10065206 350 87-95 1.94 1.5001 76 EFI
10065207 305 82-95 1.84 1.5 58
10088113 350 88+ 1.94 1.5 58 Alum., Angle Plug, Vett, Raised (0.10") D-Port Exhaust
10093328 61 Alum., Counter, Pontiac 15'
10106178 350 90 Alum., LT5, ZR1, DOHC 32 Valve, Pass. Side
10106179 350 90 Alum., LT5, ZR1, DOHC 32 Valve, Driver Side
10110810 350 90+ 65 Gen. 1
10120928 350 87-95
10125320 350 94-96 Gen. II LT1, 9C1 Police, Reverse Cooling
10128374 350 92+ 53 Gen. II LT1, Angle Plug, Alum., Reverse Cooling
10134352 45 Alum., Angle Plug, 18' Race
10134363 Alum., Bowtie Race, Angle Plug, 15' & 18', Many versions and specifications.
10147898 350 95-98 Gen I Crate
10159550 350 87-95
10159551 305 87-95
10159552 350 87-95
10159553 305 87-95
10174389 350 91-95 Alum., LT5, ZR1, DOHC, Drivers Side
10174390 350 91-95 Alum., LT5, ZR1, DOHC, Pass. Side
10185040 45 Alum., Bowtie, Splayed Valves, Ver. 1 (263cc intake ports) Ver. 2 (240cc)
10205245 350 93 68 Alum., LT1, Gen. II, Reverse Cooling
10207643 350 94-96 68 Alum., LT1, Gen. II, Reverse Cooling
10208890 265 94-96 L99, Gen. II, Reverse Cooling, 4.3L
10215339 350 97 68 Alum., LS1, Gen. III
10225121 350 94-95 Alum., LT5, ZR1, DOHC, Drivers Side
10225122 350 94-95 Alum., LT5, ZR1, DOHC, Pass. Side
10239902 350 96+ 54.4 Alum., LT4, Gen. II, Reverse Cooling, Angle plug
10239906 350 96+ 1.94 1.5 64 Vortec 5700, L31
12367712 99+ 2.0 1.55 62 Alum., Fast Burn
12367713 99+ 2.0 1.55 62 Alum., Fast Burn, ZZ430 Crate
12480005 2000 2.125 1.625 38 Alum., LS1, GTZ, Angle plug
12480011 97+ 48 Alum., Bowtie, Ver. 2 SB2
12506450 350 87-95
12509859 305 87-94
12516852 350 87-95
12529742 265 95-96 Gen. II, L99
12551561 350 96+ Alum., Gen. II, LT1
12552520 305 97+ Vortec, Truck
12554290 350 94-96 Gen. II, LT1, 9C1 Police, Reverse Cooling
12554291 265 95-96 Gen. II, L99
12555690 350 96 Alum., Gen. II, LT4
12556743 325 99 Alum., Gen. III, 5.3L, Truck, Van
12558059 305 97 1.84 1.5 Vortec, Truck
12558062 350 98 1.94 1.5 64 L31, Vortec, Truck
12558806 350 97-98 68 Alum., Gen. III, LS1
12559853 350 99+ 68 Alum., Gen. III, LS1
12559862 99-00 Alum., Gen. III, 4.8/5.3L
12559895 325 00+ Alum., Gen. III, Vortec 5.3L
12561706 01-04 Alum., Gen. III, 5.3L
12561873 364 99-01 71 Gen. III
12562317 364 01-04 71 Alum., Gen. III
12564241 350 00+ 68 Alum., Gen. III, LS1
12564243 350/364 01+ Alum., Gen. III, LS2, LS6
12572035 364 01-04 71 Alum., Gen. III, 6.0L
14008856 267 79-81
14010201 305 82-85
14010516 350 80-86
14011034 64 Bowtie, Angle plug, Phase 2
14011049 55 Alum., Bowtie, Angle Plug, Phase 6
14011083 350 55-86 1.94 1.5 64 285/300HP Crate
14014415 267/305 80-85 1.72 1.3
14014416 305 80-86 1.84 1.5 58 4 Barrel
14014440 305 80 1.84 1.5
14019261 350 84-88 1.94 1.5001
14019821 350 80-86
14019924 267 79-81
14019926 350 80-86
14020517 350 80
14020555 305 81
14020556 350 81
14022056 350 85 1.94 1.5001
14022206 350 80
14022301 305 80-86 1.85 1.5
14022601 267 80-82 1.72 1.3 53
14022601 305 80-86 1.84 1.5001 53
14022801 305 80-86
14024816 350 1.94 1.5 76 Gen. I, Crate
14034806 267 78-82
14034807 305 78-86
14034808 350 80-86
14034808 350 96+ 1.94 1.5 76 Gen. I, Crate
14034810 350 80-86 Truck
14034811 350 80-86 Truck
14039121 305 81-86 Truck
14039122 305 81-86 Truck
14071114 350 80-86
14075381 350 80-86 Truck
14079261 350 86
14085844 350 80-86 Truck
14085963 350 86 1.94 1.5001
14088526 350 Alum., Gen. II, LT1
14089119 350 86-88 1.94 1.5001 EFI
14094093 350 86-88
14096217 350 85-86 64 285/300HP Crate, 72'/90' Center Intake Bolts
14101081 305 87-95
14101083 350 87+ 1.94 1.5001 64 EFI, Gen. I, 72'Center intake Bolts
14101128 350 86-87 1.94 1.5001 58 Alum., EFI, Angle Plug
14102187 305 87-91 1.84 1.5
14102191 350 86-88 1.94 1.5001 EFI, Swirl Port
14102193 305/350 86-88 1.94 1.5001 EFI
10110810 305 86-91 1.84 1.5001 EFI, Swirl Port, Station Wagon
14101081 305 86-91 1.84 1.5001 EFI, Standard Port
14102188 350 88-93 1.94 1.5001 EFI, Swirl Port
14102187 305 86-91 1.84 1.5001 EFI, Swirl Port
22542525 Alum., 14'/17' Race
24502559 96-97 38 Alum., Bowtie
25500141 2.1 1.625 42 Alum., 10' Race
25534351C 04+ 2.0 1.55 65 Gen. I, Bowtie, Vortec
25534371C 04+ 2.0 1.55 77 Gen. I, Bowtie, Vortec
33417369 350 90+ 76 Gen. I, Mexico Crate


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