Chevrolet Small Block Heads – Casting Numbers and Specifications
Chevrolet Small Block Heads
Chevrolet Small Block Heads Combustion chamber types
Closed Chamber.
Open Chamber.
Chevrolet Small Block Heads Intake Port Types.
Rectangular Port.
Large Oval Ports.
Small Oval Ports(Peanut Port) Heads.
Choosing a performance head for your Chevrolet Small Block.
Casting Numbers to look For.
Chevrolet Small Block Head Casting Numbers
| Casting Number | Year | Engine | Chamber Size | Intake Valve | Exhaust Valve | Notes |
| 176450 | 75-76 | 262,305 | 1.71 | 1.5 | ||
| 330545 | 73 | 307, 350 | 74 | 1.72 | 1.5001 | 245 or 250 Horsepower |
| 330545 | 71-75 | 350 | 76cc | 2.02 | 1.6 | |
| 330862 | 71-73 | 400 | 1.94 | 1.5001 | ||
| 333881 | 71-76 | 350 | 1.72 | 1.5001 | 165 or 270 Horsepower | |
| 333881 | 74-75 | 350 | 76cc | 2.02 | 1.6 | |
| 333882 | 70-80 | 350,400 | 1.94 | 1.5 | 137.5 CFM Intake and 95.4 CFM Exhaust | |
| 340292 | 73-80 | 64cc | Angle plug, over the counter | |||
| 354434 | 75-80 | 262, 267, 305 | 60cc | 1.71 | 1.5 | |
| 358741 | 71-79 | 262,305 | 1.71 | 1.5 | ||
| 367450 | 75-76 | 262,305 | 1.72 | 1.3 | ||
| 376445 | 77-85 | 350 | 76cc | 1.72 | 1.5001 | Truck |
| 376450 | 75-81 | 262, 267, 305 | 60cc | 6 or 7 exhaust bolt holes | ||
| 376495 | 69-79 | 350 | ||||
| 383882 | 71-73 | 400 | ||||
| 399380 | 70-73 | 400 | ||||
| 426424 | 72-82 | 305,350,400 | ||||
| 458624 | 69-84 | 350 | Truck | |||
| 458642 | 75-84 | 350 | ||||
| 460703 | 78-80 | 350 | ||||
| 462614 | 77-79 | 305, 350 | 60cc | |||
| 462624 | 75-87 | 350 | 1.94 | 1.5 | Z-28 Camaro | |
| 462624 | 78-81 | 305 | 1.94 0R 2.02 | 1.6 | ||
| 462624 | 79-85 | 400 | 76cc | 1.94 | 1.5 | |
| 468642 | 75-84 | 350, 400 | 1.72 | 1.5001 | ||
| 471513 | 79-81 | 267, 350 | ||||
| 472424 | 76-79 | 305 | ||||
| 517513 | 79-82 | 267, 350 | ||||
| 1816887 | 63 | 283 | Made in “Canada” GMC Truck | |||
| 3238882 | 68-69 | 350 | ||||
| 3297185 | 57-67 | 327 | 1.72 | 1.5001 | ||
| 3297185 | 63-67 | 307,237,350 | ||||
| 3636839 | 55 | 265 | 1.72 | 1.5 | ||
| 3636839 | 59 | 265 | ||||
| 3703523 | 55 | 265 | 1.72 | 1.5001 | ||
| 3713358 | 55-56 | 265 | 1.72 | 1.5 | Truck | |
| 3713569 | 55-56 | 265 | 1.72 | 1.5 | Truck | |
| 3714482 | 62-67 | 327 | 1.72 | 1.5 | ||
| 3725306 | 56-57 | 265 | 1.72 | 1.5 | Corvette | |
| 3727185 | 69-73 | 307 | 1.72 | 1.5001 | ||
| 3731262 | 56 | 265 | 1.72 | 1.5 | Corvette 2 X 4 Barrel | |
| 3731539 | 57 | 283 | 1.72 | 1.5 | 283 HP FI | |
| 3731539 | 57-66 | 283 | ||||
| 3731544 | 57-61 | 265,283 | 1.72 | 1.5 | ||
| 3731554 | 55-66 | 265,283 | 1.72 | 1.5 | 2 Barrel | |
| 3731556 | 57 | 283 | 1.72 | 1.5 | Made in “Canada” Truck | |
| 3731762 | 56 | 265 | 1.72 | 1.5001 | Corvette 2 X 4 Barrel | |
| 3737465 | 60-61 | 283 | 1.72 | 1.5 | ||
| 3737775 | 62-67 | 283, 327 | 1.72 | 1.5 | ||
| 3740997 | 57 | 283 | 1.72 | 1.5 | ||
| 3743056 | 58 | 283 | 1.72 | 1.5 | Truck | |
| 3743096 | 62-67 | 327 | 1.72 | 1.5 | GMC Truck | |
| 3747363 | 57 | 265 | 1.72 | 1.5 | ||
| 3747363 | 57-62 | 283 | ||||
| 3747363 | 58-61 | 327 | Truck | |||
| 3747460 | 59-67 | 283, 327 | 70cc | |||
| 3748056 | 62-67 | 327 | 1.72 | 1.5001 | ||
| 3748720 | 57-58 | 283 | 1.5 | |||
| 3748770 | 58 | 265 | ||||
| 3748770 | 55-62 | 283 | 1.72 | 1.5 | ||
| 3748772 | 57-61 | 283 | 1.72 | 1.5 | ||
| 3755537 | 57-62 | 283 | 1.72 | 1.5 | 2 Barrel | |
| 3755538 | 59 | 283 | 1.72 | 1.5001 | Corvette FI | |
| 3755539 | 58-62 | 283 | 1.72 | 1.5 | Truck | |
| 3755549 | 57-62 | 283 | 1.72 | 1.5 | ||
| 3755550 | 57-62 | 283 | 1.72 | 1.5 | Corvette FI | |
| 3755585 | 62-67 | 327 | 1.72 | 1.5 | GMC Truck | |
| 3760116 | 59 | 283 | 1.72 | 1.5 | ||
| 3767460 | 59-64 | 265,283,327 | 68 | 1.72 | 1.5 | |
| 3767462 | 62-67 | 327 | 1.94 | 1.5 | ||
| 3767465 | 59-61 | 283 | 1.72 | 1.5001 | ||
| 3767754 | 59-61 | 283 | 60cc | |||
| 3767792 | 60-67 | 283 | 1.72 | 1.5 | ||
| 3770126 | 67-70 | 327, 350 | 1.94 | 1.5 | ||
| 3773012 | 55 | 265 | 1.72 | 1.5001 | Corvette | |
| 3774634 | 64-67 | 327 | ||||
| 3774682 | 60-67 | 283, 327 | 70cc | 1.72 | 1.5 | |
| 3774684 | 57-67 | 283,327 | 75cc | 1.72 | 1.5 | Truck |
| 3774690 | 58 | 283 | Corvette fuel injection | |||
| 3774692 | 58-67 | 283 | 60cc | Corvette | ||
| 3776434 | 64-67 | 327 | ||||
| 3782461 | 62-67 | 302,327,350 | 62cc | 1.6 | Camel hump, no accessory holes, 160/62cc port volumes | |
| 3782461X | 67 | 283, 327 | 62cc | 1.6 | Camel hump, no accessory holes, larger 172/64cc port volumes | |
| 3782462 | 62-67 | 327 | ||||
| 3782879 | 64-67 | 327 | 1.94 | 1.5 | ||
| 3790721 | 65-67 | 283 | 1.72 | 1.5 | ||
| 3792563 | 58-72 | 327 | 1.72 | 1.5 | ||
| 3795893 | 62-64 | 283,307,327 | ||||
| 3795896 | 63-65 | 283 | 60cc | |||
| 3795896 | 64-67 | 283, 327 | 60cc | 1.72 | 1.5 | |
| 3796896 | 63-67 | 283 | ||||
| 3798996 | 67 | 327 | 60cc | 1.72 | 1.5 | |
| 3814462 | 60-67 | 350 | 1.94 | 1.5001 | ||
| 3814480 | 62-67 | 283, 327 | 70cc | 1.72 | 1.5 | Truck |
| 3814482 | 59 | 283, 327 | 75cc | 1.72 | 1.5001 | Truck |
| 3817680 | 62-67 | 283, 327 | 1.72 | 1.5 | Fuel Injection | |
| 3817681 | 66-67 | 327 | 1.72 | 1.5 | ||
| 3817681 | 61-62 | 350 | 1.72 | 1.5 | ||
| 3817682 | 55 | 283 | 1.72 | 1.5 | 2 Barrel | |
| 3836839 | 55-67 | 265 | 1.72 | 1.5 | ||
| 3836842 | 62-67 | 283, 327 | 1.72 | 1.5 | ||
| 3836924 | 58-62 | 283 | 1.72 | 1.5001 | ||
| 3836942 | 58-62 | 283 | 1.72 | 1.5001 | ||
| 3837063 | 56 | 283 | 1.72 | 1.5001 | ||
| 3837064 | 55-62 | 265, 283 | 1.72 | 1.5 | ||
| 3837065 | 57 | 265 | 1.72 | 1.5 | Truck | |
| 3837739 | 62-67 | 283 | 1.72 | 1.5 | ||
| 3837775 | 57-58 | 283,327 | 1.72 | 1.5001 | ||
| 3848720 | 65 | 283 | 1.72 | 1.5 | ||
| 3849820 | 65-67 | 327 | 1.72 | 1.5001 | ||
| 3849935 | 62-64 | 283 | 1.72 | 1.5 | ||
| 3852174 | 62-67 | 327 | 1.72 | 1.5 | ||
| 3854520 | 68-76 | 283,327 | 1.72 | 1.5 | ||
| 3855961 | 57-60 | 350 | 1.72 | 1.5 | ||
| 3867802 | 56-57 | 283 | 1.72 | 1.5 | Corvette Fuel Injection | |
| 3873064 | 62-67 | 265 | 1.72 | 1.5001 | ||
| 3876132 | 71-73 | 327 | 1.94 | 1.5 | ||
| 3876487 | 57-67 | 350 | 1.94 | 1.5001 | ||
| 3876775 | 60-67 | 283,327 | 75cc | 1.72 | 1.5 | Truck |
| 3878775 | 60-67 | 327 | Truck | |||
| 3884520 | 62-68 | 283, 327 | 60cc | 1.72 | 1.5 | Some marked “Made in Canada”, also used by Studebaker |
| 3890462 | 62-67 | 302,327,350 | 64cc | 1.94 OR 2.02 | 1.6 | Camel hump, no accessory holes |
| 3891462 | 64-67 | 302,327,350 | 1.94 | 1.5001 | ||
| 3891492 | 87-up | 327 | ||||
| 3901068 | 68 | 350 | 64cc | Crate motor, 285HP | ||
| 3911011 | 68 | 327 | 1.72 | 1.5001 | ||
| 3911032 | 58-70 | 307, 327 | 70cc | 1.72 | 1.5 | Truck |
| 3912264 | 63-64 | 283 | 1.72 | 1.5 | ||
| 3912265 | 68-70 | 283 | 1.72 | 1.5 | ||
| 3912291 | 65-67 | 302,327,350 | 1.94 | 1.5001 | ||
| 3912311 | 65-67 | 327, 350 | 1.94 | 1.5 | ||
| 3912313 | 65-73 | 327 | 1.72 | 1.5 | ||
| 3914636 | 67 | 307 | 1.72 | 1.5 | ||
| 3917264 | 67-68 | 302 | 2.02 | 1.6 | Z28 Camaro | |
| 3917290 | 68-70 | 307, 327 | 1.71 | 1.5 | Truck | |
| 3917291 | 67-69 | 302, 307, 327, 350 | 63cc | 1.94 | 1.5 | Camel hump, no accessory holes |
| 3917292 | 67-68 | 327, 350 | 64cc | 1.94 | 1.5 | Camel hump |
| 3917293 | 66-69 | 307, 327 | 75cc | 1.72 | 1.5 | |
| 3921175 | 67-79 | 327 | 2.02 | 1.6 | ||
| 3923441 | 68-73 | 307,327,350 | 1.71 | 1.5 | ||
| 3927185 | 69-76 | 307,327,350 | 70cc | 1.72 | 1.5 | |
| 3927186 | 68-72 | 302, 327, 350 | 64cc | 2.02 | 1.6 | Camel hump, has accessory holes |
| 3927187 | 69 | 302, 350 | 64cc | 2.02 | 1.6 | Camel hump, has accessory holes |
| 3927188 | 68 | 307,327,350 | 74cc | 1.72 | 1.5 | Truck |
| 3927188 | 70 | 307 | 74cc | |||
| 3928454 | 68 | 307 | 1.72 | 1.5 | ||
| 3928455 | 68 | 302,327 | 2.02 | 1.6 | ||
| 3928494 | 68 | 327,350 | 2.02 | 1.6 | ||
| 3928495 | 68-73 | 327 | 1.94 | 1.5 | ||
| 3931633 | 68-76 | 307 | 1.72 | 1.5 | ||
| 3931635 | 68-69 | 350 | 1.72 | 1.5 | ||
| 3931637 | 68 | 327 | 1.94 | 1.5 | ||
| 3931638 | 68 | 327 | 1.72 | 1.5 | Truck | |
| 3931639 | 68-73 | 302 | 2.02 | 1.6 | ||
| 3932373 | 67-79 | 307 | 1.72 | 1.5 | ||
| 3932441 | 68-72 | 327, 350 | 76cc | 1.94 | 1.5 | 152 CFM Intake 93.2 CFM Exhaust |
| 3932441X | 68-79 | 350, 400 | 80cc | |||
| 3932454 | 76 | 350 | Truck | |||
| 3932454 | 68-73 | 307,350 | 1.72 | 1.5 | ||
| 3932882 | 68 | 400 | 1.94 | 1.5 | ||
| 3933148 | 69 | 350 | ||||
| 3941174 | 69-70 | 327 | ||||
| 3946812 | 69-79 | 350 | 1.72 | 1.5 | Truck | |
| 3946813 | 68-70 | 350 | 1.72 | 1.5 | Truck | |
| 3947014 | 68-70 | 350 | ||||
| 3947040 | 68-79 | 327 | 64cc | Right angle casting identifier,, used in trucks, no accessory holes | ||
| 3947041 | 69-71 | 302, 327, 350 | 64cc | 1.94 | 1.5 | Right angle casting identifier, accessory holes, |
| 3947041X | 70-76 | 302, 350 | 64cc | Right angle casting identifier, 165cc intake port, accessory holes, | ||
| 3951598 | 68-77 | 400 | 76cc | 1.94 | 1.5 | 2 barrel |
| 3961598 | 70 | 400 | ||||
| 3964286 | 67-71 | 350 | 1.72 | 1.5 | ||
| 3965742 | 67-79 | 350 | Over the counter, angle plug L98 style | |||
| 3970126 | 69-73 | 327,350 | 1.71 | 1.5 | CFM inl 148.3 / exh 87.6 | |
| 3971293 | 64-70 | 307,327 | ||||
| 3973195 | 70 | 400 | Truck | |||
| 3973370 | 68-72 | 350 | 64cc | Over the counter in US, Canadian 350/300hp production use in Pontiac, straight or angle plug | ||
| 3973414 | 68-79 | 327, 350 | 64cc | 2.02 | 1.6 | Camel Hump, LT1-350/370hp |
| 3973487 | 71-76 | 350 | 75cc | 1.94 or 2.02 | 1.5 or 1.6 | |
| 3973487X | 62-67 | 350 | 75cc | 1.94 or 2.02 | 1.5 or 1.6 | |
| 3973493 | 67 | 400 | 1.94 | 1.5 | CFM inl 143 / exh 87 | |
| 3973493 | 71-72 | 400 | 76cc | 1.94 | 1.5 | |
| 3981462 | 71 | 327 | 1.94 | 1.5 | ||
| 3981462 | 69-79 | 302 | 1.94 | 1.5 | ||
| 3986316 | 68-69 | 350 | 76cc | |||
| 3986330 | 70-76 | 350 | ||||
| 3986336 | 71 | 350 | 76cc | |||
| 3986336X | 68-71 | 350 | 76cc | |||
| 3986339 | 62-68 | 307, 350 | 74cc | |||
| 3986339 | 68-76 | 307 | 1.72 | 1.5 | ||
| 3986339 | 68-79 | 350 | 1.72 | 1.5 | ||
| 3986339X | 68-73 | 307, 350 | 74cc | |||
| 3986388 | 70-71 | 350 | 1.71 | 1.5 | Truck | |
| 3986388 | 69-72 | 307 | 1.72 | 1.5 | ||
| 3990462 | 72 | 327 | 1.94 | 1.5 | ||
| 3991492 | 72-75 | 327,350 | 64cc | 2.02 | 1.6 | LT1, Camel hump, accessory holes, straight plug |
| 3997417 | 68-69 | 307 | 72 | 1.72 | 1.5001 | Cars |
| 3998916 | 70-76 | 350 , 400 | 76cc | 1.94 | 1.5 | Also used w/’72 350 LT1, big valve, screw in studs |
| 3998920 | 68-76 | 350 | 1.94 | 1.5 | ||
| 3998991 | 71-73 | 307, 350 | 75cc | 1.72 | 1.5 | |
| 3998993 | 68-76 | 307, 350 | 75cc | |||
| 3998993 | 78-84 | 350 | 1.94 | 1.5 | CFM inl 150 / exh 91 | |
| 3998997 | 68-76 | 305, 350 | 76cc | 1.94 | 1.5 | |
| 3998997 | 72-73 | 350,400 | 1.94 | 1.5 | ||
| 4079261 | 350 | |||||
| 6259425 | 350 | 1.72 | 1.5 | |||
| 6259515 | 350 | 76 | 1.94 | 1.5001 | cars | |
| 6260856 | 87-95 | 350 | 1.72 | 1.5 | ||
| 6272070 | 87-95 | 350 | 76 | 1.72 | 1.5001 | |
| 8917291 | 87-95 | 350 | 64 | 1.94 | 1.5 | |
| 10033867 | 87-95 | 62cc | Aluminum, over the counter Pontiac 23′ head, angle plug, 196cc intake port | |||
| 10045434 | 87 | 55cc | Aluminum, Over the counter Pontiac 15′ head, angle plug, raised runner, “rollover” head | |||
| 10051101 | 87-95 | 55cc | Aluminum, Bowtie, angle plug, raised runner, 196cc intake port | |||
| 10065202 | 87-95 | 350 | Truck | |||
| 10065203 | 88-up | 350 | Truck | |||
| 10065204 | 350 | |||||
| 10065205 | 90 | 305 | ||||
| 10065206 | 86-91 | 350 | 1.94 | 1.5001 | EFI | |
| 10065207 | 91-up | 305 | ||||
| 10088113 | 87-95 | 350 | 58cc | 1.94 | 1.5 | Aluminum, angle plug, raised “D” port exhaust |
| 10093328 | 94-96 | 61cc | Aluminum, Over the counter Pontiac 15′ head, 224cc ports, “roll over” head | |||
| 10106178 | 92-up | 350 | Aluminum, LT5, ZR1, DOHC, 32-Valve, pass. Side. | |||
| 10106179 | Bowtie | 350 | Aluminum, LT5, ZR1, DOHC, 32-Valve, drivers Side. | |||
| 10110810 | 95-98 | 350 | 65cc | Gen. 1 | ||
| 10120928 | 87-95 | 350 | ||||
| 10125320 | 87-95 | 350 | Gen.II LT1, cast iron version, used on “9C1” Police package, Impala SS, Cadillac Fleetwood, Buick Roadmaster, reverse flow cooling | |||
| 10128374 | 87-95 | 350 | 53cc | Aluminum, Gen.II LT1, angle plug, reverse flow cooling, 175/68cc ports | ||
| 10134352 | 87-95 | 45cc | Aluminum, angle plug, “low” port, 223cc intake port, 18′ race head | |||
| 10134363 | 91-94 | 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 | 91-95 | 350 | Gen.I crate motor | |||
| 10159550 | Bowtie | 350 | ||||
| 10159551 | Bowtie | 305 | ||||
| 10159552 | 93 | 350 | ||||
| 10159553 | 94-96 | 305 | ||||
| 10174389 | 94-96 | 350 | Aluminum, LT5, ZR1, DOHC, 32-Valve, pass. Side. | |||
| 10174390 | 97 | 350 | Aluminum, LT5, ZR1, DOHC, 32-Valve, drivers Side. | |||
| 10185040 | 94-95 | 45cc | Aluminum, Bowtie, 1st version, symmetrical ports, 263cc intake ports, splayed valves | |||
| 10205245 | 96-up | 350 | 68cc | Aluminum, Gen.II LT1, reverse flow cooling, 175/68cc port volumes | ||
| 10207643 | 96-up | 350 | 68cc | Aluminum, Gen.II LT1, reverse flow cooling, 175/68cc port volumes | ||
| 10208890 | 99-up | 265 | Gen.II, L99, 4.3 Liter V8, cast iron, reverse flow cooling | |||
| 10215339 | 99-up | 350 | 68cc | Aluminum, Gen.III, LS1, | ||
| 10225121 | 2000 | 350 | Aluminum, LT5, ZR1, DOHC, 32-Valve, Drivers Side. | |||
| 10225122 | 97-up | 350 | Aluminum, LT5, ZR1, DOHC, 32-Valve, Pass. Side. | |||
| 10239902 | 87-95 | 350 | 54.4cc | Aluminum, Gen.II LT4, reverse flow cooling, 195cc Intake port, angle plug. | ||
| 10239906 | 87-94 | 350 | 1.94 | 1.5 | Vortec 5700, “L31”, 170cc Intake port | |
| 12367712 | 87-95 | 62cc | 2 | 1.55 | Aluminum, FastBurn, 210cc Intake port | |
| 12367713 | 95-96 | 62cc | 2 | 1.55 | Aluminum, Fast Burn used on ZZ430 crate motor, 210cc Intake Port | |
| 12480005 | 96 | 38cc | 2.125 | 1.65 | Aluminum, Ls1″GTZ”, angle plug, | |
| 12480011 | 97-up | 48cc | Aluminum, “SB2.2” 2nd version, “mirror ports” revised valve angles and plug location | |||
| 12506450 | 94-96 | 350 | ||||
| 12509859 | 95-96 | 305 | ||||
| 12516852 | 96 | 350 | ||||
| 12529742 | 99 | 265 | Gen.II, L99, cast iron | |||
| 12551561 | 97 | 350 | Aluminum, Gen.II, “LT1” | |||
| 12552520 | 98 | 305 | Vortec, truck | |||
| 12554290 | 97-98 | 350 | Gen.II LT1, cast iron version, used on “9C1” Police package, Impala SS, Cadillac Fleetwood, Buick Roadmaster, reverse flow cooling | |||
| 12554291 | 99-up | 265 | Gen.II, “l99” CAST IRON | |||
| 12555690 | 99-00 | 350 | Aluminum, Gen.II, “LT4” | |||
| 12556743 | 00-up | 325 | Aluminum, Gen.III, 5.3L truck, van | |||
| 12558059 | 4-Jan | 305 | Vortec, truck | |||
| 12558062 | 99-01 | 350 | 68cc | 1.94 | 1.5 | L31 Vortec, 170cc Intake port, truck |
| 12558806 | 4-Jan | 350 | 68cc | Aluminum, Gen.III, “LS1” | ||
| 12559853 | 00-up | 350 | 68cc | Aluminum, Gen.III, “LS1” | ||
| 12559862 | 01-up | Aluminum, GEN.III, 4.8/5.3L | ||||
| 12559895 | 4-Jan | 325 | Aluminum, Gen.III, Vortec, 5.3L | |||
| 12561706 | 79-81 | Aluminum, Gen.III, 5.3L | ||||
| 12561873 | 82-85 | 364 | 71cc | Iron, Gen.III | ||
| 12562317 | 80-86 | 364 | 71cc | Aluminum, Gen.III | ||
| 12564241 | 80 | 350 | 68cc | Aluminum, Gen.III, “LS1” | ||
| 12564243 | Bowtie | 350, 364 | Aluminum, Gen.III, “LS6”, “LS2” | |||
| 12572035 | 82 | 364 | 71cc | Aluminum, Gen.III, 6.0L | ||
| 14008856 | Bowtie | 267 | ||||
| 14010201 | 55-86 | 305 | ||||
| 14010516 | 80-81 | 350 | ||||
| 14011034 | 80-85 | 350 | 64cc | 2.02 | 1.6 | Iron, 184cc intake ports, angle plug, “Phase II head” |
| 14011049 | 80-86 | 350 | 55cc | 2.02 | 1.6 | Aluminum, 180cc intake port, angle plug, “Phase 6” |
| 14011083 | 80 | 350 | 64cc | 1.94 | 1.5 | Crate motor for years indicated. 285/300HP |
| 14014415 | 79-88 | 267, 305 | ||||
| 14014416 | 80-86 | 267,305,350 | 58cc | 1.85 | 1.5 | 4 barrel |
| 14014440 | 80 | 305 | ||||
| 14019261 | 81 | 350 | 1.94 | 1.5001 | ||
| 14019821 | 81 | 350 | ||||
| 14019924 | 85 | 267 | ||||
| 14019926 | 80 | 350 | ||||
| 14020516 | 80-84 | 350 | ||||
| 14020517 | 80-86 | 350 | ||||
| 14020555 | 79-86 | 305, 350 | ||||
| 14020556 | 80-82 | 350 | ||||
| 14022056 | 80-86 | 350 | 1.94 | 1.5001 | ||
| 14022206 | 80-86 | 350 | ||||
| 14022301 | 78-82 | 305 | 1.85 | 1.5 | ||
| 14022601 | 78-86 | 267,305 | 1.71 | 1.5 | ||
| 14022601 | 96-up | 267, 305 | 53cc | 1.72 or 1.84 | 1.84 or 1.5 | |
| 14022801 | 80-86 | 305 | 1.71 | 1.5 | ||
| 14024816 | 80-86 | 350 | 76cc | 1.94 | 1.5 | Gen.I crate motors |
| 14034806 | 81-86 | 267 | ||||
| 14034807 | 81-86 | 305 | ||||
| 14034808 | 80-86 | 350 | 76cc | 1.94 | 1.5 | Gen.I Goodwrench crate motors |
| 14034810 | 86 | 350 | Truck | |||
| 14034811 | 80-86 | 350 | Truck | |||
| 14039121 | 86 | 305 | Truck | |||
| 14039122 | 305 | Truck | ||||
| 14071114 | 86-88 | 350 | ||||
| 14075381 | 86-88 | 350 | Truck | |||
| 14079261 | 55-86 | 350 | ||||
| 14085844 | 86-91 | 350 | Truck | |||
| 14085963 | 87-95 | 350 | 1.94 | 1.5001 | ||
| 14088526 | 87 | 350 | Aluminum, Gen.II, LT1 | |||
| 14089119 | 87-up | 350 | 1.94 | 1.5001 | EFI | |
| 14094093 | 86-87 | 350 | ||||
| 14096217 | 87 | 350 | 64cc | Crate motor, 285/300hp, 72′ or 90′ center intake manifold bolt angels | ||
| 14101081 | 86-91 | 305 | 1.84 | 1.5001 | EFI, std port | |
| 14101083 | 86-88 | 350 | 64cc | Gen.I, also used on crate motors, 285/300hp, 72′ center manifold bolt angle. | ||
| 14101083 | 88-93 | 350 | 1.94 | 1.5001 | EFI | |
| 14101128 | 86-88 | 350 | 1.94 | 1.5001 | EFI | |
| 14101128 | 87-up | 350 | 58cc | Aluminum, angle plug | ||
| 14102187 | 87-up | 305 | 1.84 | 1.5001 | EFI, swirl port | |
| 14102188 | 96-97 | 350 | 1.94 | 1.5001 | EFI, swirl port | |
| 14102191 | 90-up | 350 | 1.94 | 1.5001 | EFI, swirl port | |
| 14102193 | 04-up | 305, 350 | 1.94 | 1.5001 | EFI | |
| 22542525 | 55 | Aluminum, Dart/Olds/Chevy, 14′ or 17′ race head | ||||
| 24502559 | 57 | 38cc | Aluminum, Bowtie, “SB2”, 1st version, “mirror ports”, 196cc intake ports, CNC Version 280cc intake ports | |||
| 25500141 | 60-63 | 42cc | 2.1 | 1.65 | Aluminum, Buick/Chevy, 10′ race head, symmetrical ports, 235cc intake ports | |
| 25534351C | 69-70 | 2 | 1.55 | cast iron Vortec head, Gen.I Bowtie, 175/65cc ports, small port head | ||
| 25534371C | 69-70 | 2 | 1.55 | cast iron Vortec head, Gen.I Bowtie, 206/77cc ports, large port head | ||
| 33417369 | 71-72 | 350 | 76cc | Gen.I Goodwrench crate motor, Hecho en Mexico | ||
| 370r3523 | 71 | 265 | ||||
| 3740r997 | 71 | 283 | 2×4 & FI (exc.-283hp) | |||
Visually identifying the Chevy Small Blocks Heads.
