| Number | Size | Rated Horsepower | Production | Main Caps |
| 340220 | 427 | 1968-1976 | Four-bolt (tall-deck) | |
| 346236 | 454 | 1975 | Two-bolt | |
| 361959 | 454 | 1978-1987 | Two-bolt or four-bolt | |
| 364776 | 427 | 1974-1976 | Four-bolt (tall-deck) | |
| 364776 | 454 | 1977-1990 | Four-bolt (tall-deck) | |
| 364779 | 366 | 1968-1990 | Four-bolt (tall-deck) | |
| 473478 | 427 | 1977-1990 | Four-bolt (tall-deck) | |
| 1014183 | 366 | 1991-1992 | Four-bolt (tall-deck) | |
| 3855961 | 396 | 325 and 360 | 1966 | Two-bolt |
| 3855962 | 396 | 360, 375, and 425 | 1965-1066 | Two-bolt or four-bolt |
| 3869942 | 427 | 390 and 425 | 1966 | Two-bolt or four-bolt |
| 3873858 | 396 | 375 | 1966 | Four-bolt |
| 3902406 | 396 | 325, 350, and 375 | 1967 | Two-bolt or four-bolt |
| 3904351 | 427 | 425 | 1967 | Four-bolt |
| 3916321 | 427 | 425 and 435 | 1968 | Four-bolt |
| 3916323 | 396 | 325, 350, and 375 | 1968 | Two-bolt or four-bolt |
| 3935439 | 427 | 435 | 1968 and 1969 | Four-bolt |
| 3935440 | 396 | 350 and 375 | 1969 | Two-bolt or four-bolt |
| 3937724 | 366 | 1968-1976 | Four-bolt (tall-deck) | |
| 3955272 | 396 | 325, 350, and 375 | 1969 | Two-bolt or four-bolt |
| 3955272 | 402 | 325, 350, and 375 | 1969 | Two-bolt or four-bolt |
| 3955274 | 366 | 1968-1976 | Four-bolt (tall-deck) | |
| 3955276 | 427 | 1968-1973 | Four-bolt (tall-deck) | |
| 3963512 | 454 | 360, 375, 425, and 460 | 1968-1971 | Two-bolt or four-bolt |
| 3969852 | 366 | 1968-1976 | Four-bolt (tall-deck) | |
| 3969854 | 402 | 360 and 375 | 1972 | Two-bolt |
| 3969854 | 454 | 360 and 375 | 1972 | Two-bolt |
| 3969858 | 427 | 1968-1973 | Four-bolt (tall-deck) | |
| 3999289 | 454 | 1972-1979 | Two-bolt | |
| 3999290 | 402 | 240 | 1972 | Two-bolt |
| 3999293 | 366 | 1968-1976 | Four-bolt (tall-deck) | |
| 3999294 | 427 | 1968-1973 | Four-bolt (tall-deck) | |
| 10114182 | 454 | 1992 | Four-bolt (tall-deck) | |
| 10114184 | 427 | 1991-1992 | Two-bolt or four-bolt | |
| 14015445 | 454 | 1978-1987 | Two-bolt or four-bolt |
GM BIG BLOCK CASTING NUMBERS
BBC oval port cylinder head casting numbers
| Number | Engine Size | Year | Combustion Chambers |
| 336781 | 454 | 1973-1985 | Open chamber |
| 346236 | 454 | 1975-1978 | Open chamber ("peanut" ports) |
| 353049 | 454 | 1970-1973 | Open chamber |
| 3872702 | 396 and 427 | 1966 | Closed chamber |
| 3904390 | 427 | 1966 | Closed chamber |
| 3904390 | 427 | 1966 | Closed chamber |
| 3909802 | 396 and 427 | 1966-1967 | Closed chamber |
| 3917215 | 396 and 427 | 1966-1969 | Closed chamber |
| 3931063 | 396 and 427 | 1966-1969 | Closed chamber |
| 3964280 | 427 and 454 | 1966-1970 | Closed chamber |
| 3964290 | 427 and 454 | 1966-1970 | Closed chamber |
| 3993820 | 402 and 454 | 1970-1971 | Open chamber |
| 3999241 | 402 | 1970-1972 | Open chamber |
| 6272292 | 402 and 454 | 1971 | Open chamber |
BBC rectangular port cylinder head casting numbers
| Number | Engine Size | Year | Combustion Chambers |
| 3856208 | 396 | 1965 | Closed chamber |
| 3904391 | 396 and 427 | 1965-1967 | Closed chamber |
| 3919840 | 396 and 427 | 1965-1969 | Closed chamber |
| 3964291 | 396, 402, and 427 | 1965-1970 | Closed chamber |
| 3964292 | 454 | 1970 | Closed chamber |
| 3994025 | 454 | 1971 | Open chamber |
| 3994026 | 454 | 1971 | Open chamber |
| 3996074 | 454 | 1971 | Open chamber |
| 6258723 | 454 | 1971 | Open chamber |
| 6272990 | 454 | 1971 | Open chamber |
SBC Block Casting Numbers
| Casting # | Years made |
Size | HP levels used for |
Notes |
|---|---|---|---|---|
| 3703524 | 55 | 265 | N/A | Passenger First 6 mos. used mech. cam not hyd. |
| 3720991 | 56 - 57 | 265 | N/A | Truck/Pass |
| 3731548 | 57 | 283 | N/A | N/A |
| 3556519 3737739 |
58 - 61 | 283 | 220-290 | 2-Bolt mains/Truck/Pass |
| 3849852 | 58 - 64 | 283 | 220-315 | 2-Bolt mains/Truck/Pass |
| 3789935 3864812 |
62 - 64 | 283 | 230-315 | 2-Bolt mains/Truck/Pass |
| 3959512 | 62 - 63 | 327 | 250 | 2-Bolt mains |
| 3789817 3794460 |
62 - 64 | 327 | 250 | 2-Bolt mains Truck/Pass |
| 3858174 | 62 - 67 | 350, 327 & 302 | 210-350 | 2-Bolt mains/Truck/Pass |
| 3782870 | 62 - 67 | 327 | 250-375 | 2-Bolt mains/Truck/Pass |
| 3858180 | 62 - 67 | 327 | 250-375 | 2-Bolt mains/Truck/Pass |
| 3791362 | 65 - 67 | 327 | N/A | 2-Bolt mains/Chevy II |
| 3892657 3782870 3903352 3789817 |
64 - 67 | 350, 327 & 302 | 210-350 | 2-Bolt mains Truck/Pass |
| 3849852 3849935 3896944 393288 |
65 - 67 | 283 | N/A | Truck/Pass |
| 389257 | 67 - 69 | 302 | N/A | 2-Bolt mains 67 Small Journal (327 block) 68-69 Large Journal (350 block) |
| 3914653 3914636 3932373 3970020 |
68 - 73 | 307 | N/A | Truck/Pass |
| 3956632 | 69 | 307 | 200 | 2-bolt mains |
| 3914660 | 68 | 327 | 210-275 | 2-bolt mains |
| 3790041 3814660 3955618 |
68 - 69 | 327 | 210-300 | 2-Bolt mains Corvette/Camaro/Hi PO |
| 3914678 | 68 - 79 | 350, 327 &: 302 | 210-350 | 2-Bolt mains |
| 3855961 3958618 3970014 6259425 |
68 - 76 | 350 | 210-300 | 2-bolt mains Pass. |
| 3970014 | 68 - 79 | 350 | 200-255 | 2&4-Bolt main |
| 3956618 3932386 |
68 - 79 | 350 & 302 | 250-300 | 4 bolt mains Truck/Hi Perf |
| 3970010 | 68 - 79 | 350 & 327 | 145-375 | 2&4-Bolt mains/Truck/Hi Perf |
| 3932388 | 69 | 350 | 300 | 4-bolt mains |
| 3951511 | 70 - 73 | 400 | 255-265 | 4 Bolt mains/HD Truck/Pass |
| 330817 | 70 - 80 | 400 | 150-180 | 2-Bolt mains |
| 360851 | 74 - 76 | 262 | N/A | Monza |
| 3951509 3030817++ |
74 - 76 | 400 | 150-265 | 2 Bolt Mains ++High Nickel Block |
| 460776 460777 460778 361979 |
78 - 79 | 305 | N/A | Lt. Truck/Pass |
| 14016379 | 78 - 79 | 350 | N/A | Lt.Truck/Pass |
| 366245* | 78 - 79 | 350 | N\A | 4-Bolt mains *Bowtie High Tin Dipstick in Pan |
| 1401280 14016376 471511 |
79 - 82 | 267 | N/A | Passenger |
| 14010201 14016381 14010202 14010203 |
80 - 84 | 305 | N/A | Lt. Truck/Pass |
| 1401029 14010207 14010209 |
80 - 85 | 350 | 205 & up | 2&4-Bolt mains Passenger cars |
| 14011064* | 82 - 86 | 350 | N\A | 4-Bolt mains/*Bowtie High Tin |
| 14088548 14093638 14316379 |
86 - 88 | 350 | 205 & up | 2&4-Bolt mains 1 piece rear main seal. |
SBC Head Casting Numbers
| Casting # | Years made |
Valve Size |
HP levels used for |
Chamber Size / Notes |
|---|---|---|---|---|
| 3782461 | 61-70 | 1.94/1.50 & 2.02/1.6 |
250-375 | 64 CC Chambers No bolt holes These are the double humps. |
| 3890462 | 62-68 | 1.94/1.50 & 2.02/1.6 |
250-350 | 64 CC Chambers No bolt holes These are also double humps. |
| 3927185 | 69 | 1.72/1.50 | 200-210 | 70cc Chambers |
| 3927185 | 69 | 1.72/1.50 | 200-210 | 70cc Chambers |
| 3917293 | 68 | 1.72/1.50 | 210 | 76cc Chambers |
| 3917291 | 62-69 | 1.94/1.50 & 2.02/1.6 |
275-350 | 64 CC Chambers No bolt holes These are the 'Turbo' heads. |
| 3927186 | 68-72 | 1.94/1.50 & 2.02/1.6 |
290-370 | 64 CC Chambers has bolt holes These are the 'powerpack' heads. |
| 3932441 | 67-79 | 1.94/1.50 | 250 & 255 | 76 CC Chambers Intake flow 152 CFM Exhaust flow 93.2 CFM |
| 3947040 | 68-70 | 1.94/1.50 & 2.02/1.6 |
290-370 | 64 CC Chambers |
| 3947041 | 68-70 | 1.94/1.50 & 2.02/1.6 |
290-370 | 64 CC Chambers |
| 3973414 | 64-70 | 2.02/1.6 | 360 & 370 | 64 CC Chambers Z-28 & Corvette LT-1. |
| 3973487 | 68-79 | 1.94/1.50 & 2.02/1.6 |
165-330 | 76 CC Chambers X casting has 10 more intake cc volume. |
| 3998993 | 68-79 | 1.72/1.50 & 1.94/1.50 |
115-175 | 76 CC Chambers Intake flow 150.8 CFM Exhaust flow 91.1 CFM |
| 333882 | 70-80 | 1.94/1.50 | 150-180 | 76CC Chambers Intake flow 137.2 CFM Exhaust flow 95.4 CFM |
| 462624 | 76-87 | 1.94/1.50 & 2.02/1.60 |
Not listed | 76 CC Chambers These are crack prone! |
SBC Crank Casting Numbers
| Casting # | Stroke | Years made |
Main\rod Journal Size |
Construction / Notes |
|---|---|---|---|---|
| 1130 | 3.25 | 68-73 | 2.45/2.10 | Cast large journal |
| 3815822 | 3.00 | 67 | 2.30/2.00 | forged Tuffrided Special Flange |
| 14088532 | 3.48 | 86-88 | 2.45/2.10 | Forged One Piece rear main seal. |
| 3279 | 3.00 | 68-69 | 2.45/2.10 | forged large journal High Perf. |
| 3814671 | 3.25 | 68 | 2.45/2.10 | forged large journal High Perf. |
| 3729449 | 3.00 | 55-67 | 2.30/2.00 | Forged small journal |
| 3941182 | 3.48 | 68-76 | 2.45/2.10 | forged large journal |
| 3923279 | 3.00 | 68 | 2.45/2.10 | forged large journal High Perf. |
| 3782680 | 3.25 | 62-67 | 2.30/2.00 | Forged Small Journal |
| 3884577 | 3.25 | 66-67 | 2.30/2.20 | forged small journal High Perf. |
| 3911011 | 3.25 | 68-69 | 2.45/2.10 | cast large journal |
| 3941178 | 3.00 | 68-69 | 2.45/2.10 | Forged large journal High perf. |
| 3951529 | 3.75 | 70-80 | 2.65/2.10 | Cast large journal Externally Balanced. |
| 3932442 | 3.48 | 69-85 | 2.45/2.10 | cast large journal |
| 3892690 | 3.48 | 69-85 | 2.45/2.10 | Forged large journal |
| 3941188 | 3.48 | 69-71 | 2.45/2.10 | forged large journal High Perf. |
| 3911001 | 3.25 | 68-73 | 2.45/2.10 | cast large journal |
| 39411182 | 3.48 | 69-85 | 2.45/2.10 | Forged large journal |
| 354431 | 3.10 | 75-76 | 2.45/2.10 | Cast large journal only found in the 262, makes good stroker crank for 283's |
lnk