The Engine Block Casting code is one of the best ways to identify a Chevy engine block. This Casting number is usually found at the rear of the block on the left or drivers side on top of the bellhousing flange.

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Engine Block Codes (ALL)

Casting Years CID HP Main Notes
140029 1980-84 350 2
330817 1970-80 400 150-180 2
355909 1975 262 2
355909 1976-79 305 2
360851 1975-76 262 2 Monza V-8
361979 1978-79 305 2
366245 1978-82 350 N\A 4 Bowtie High Tin
366286 4 Bowtie, Aluminum, siamesed, straight nodular iron main caps, 2-piece seal, 4.00-4.150" bores, 2.45" main journals
366287 4 Bowtie, Aluminum, siamesed, straight nodular iron main caps, 2-piece seal, 4.00-4.150" bores, 2.45" main journals
366299 4 Bowtie, Aluminum, nodular iron splayed caps, wet sump, 4.00" bore
376450 1978 350 175-220 4 corvette uncertain
393288 1965-67 283 2
460703 1978 350 175-220 4 corvette uncertain
460776 1978-79 305 2
460777 1978-79 305 2
460778 1978-79 305 2
471511 1979-82 267 2
3556519 1958-62 283 2
3703524 1955 265 195 2 No oil filter corvette
3720991 1956-57 265 210-240 2 corvette
3731548 1957 283 220-283 2 No side motor mounts, corvette
3731548 1957 265 2 No side motor mounts
3737739 1957-64 283 170-290 2 220-290hp Corvette's
3756519 1958-62 283 170-315 2 passenger, corvette
3782870 1962-67 327 250-375 2 passenger, chevelle, corvette
3789817 1958-68 283 2
3789817 1962-67 327 2 truck
3789935 1961-66 283 only 170-315 2 passenger, corvette
3790721 1962-65 283 170-220 2 Chevy II recessed oil filter boss
3790721 1965-66 327 250-350 2 Chevy II recessed oil filter boss
3791362 1962-67 327 250-350 2 Chevy II recessed oil filter boss
3792563 1965 327 2
3792582 1964-65 283 2
3794226 1958-63 283 170-195 2 passenger
3794460 1962-64 327 2
3814660 1968-69 327 2
3830944 1963 327 2
3834810 1964-66 283 195-200 2 passenger, chevelle, truck
3834812 1962-63 283 170-195 2 passenger, commercial trucks
3837739 1958-62 283 2
3849852 1957-66 283 multiple 2 truck, passenger, chevelle
3849935 1965-67 283 2
3858174 1964-67 327 275-350 2 passenger, chevelle, corvette, trucks
3858180 1964-67 327 250-375 2 passenger, chevelle, corvette
3858618 1968-76 350 2 unverified
3862194 1965-67 283 195-220 2 Chevy II recessed oil filter boss
3862812 1962-64 283 2 unverified
3892657 1967 350 295 2 Camaro
3892657 1966-67 327 210-350 2 Passenger/Chevelle/Corvette/Camaro
3892657 1967 302 290 2 Z28 Camaro
3896944 1967 283 195 2 Passenger/Chevelle
3896948 1966-67 283 2
3903352 1967 327 210-350 2 Passenger/Chevelle/Corvette/Camaro
3914636 1968 307 200 2 Truck/Passenger/Chevelle/Chevy II
3914653 1968-73 307 2 unverified
3914660 1968 327 210-300 2 Passenger/Chevelle/Chevy II/Camaro/Corvette
3914678 1968 302 290 2 Z-28 Camaro
3914678 1968 327 210-350 2 Passenger/Chevelle/Chevy II/Camaro/Corvette
3914678 1968 350 295 2 Chevy II/Camaro
3932338 1962-67 283 2
3932371 1969-73 307 2
3932373 1968-73 307 2
3932386 1969 350 300/350 4 Passenger/Chevelle/Chevey II/Corvette/Camaro
3932386 1969 302 290 4 Z-28 Camaro
3932386 1969 327 2 ?? Unverified
3932388 1969 350 Various 2/4 Passenger/Camaro Rare?-NO! See FAQ on site
3932388 1969 302 290 4 Z-28 Camaro Rare?-NO! See FAQ on site
3951509 1970-80 400 only 150-265 2/4
3951511 1970-80 400 255/265 2/4 Some replacement blocks had 2-bolt main caps
3956618 1969 302 290 4 Z-28 Camaro
3956618 1968-69 327 235 2 Passenger
3956618 1969 350 250-350 2/4 Passenger/Chevelle/Chevy II/Corvette/Camaro
3956632 1969 307 200 2 Truck/Chevelle/Chevy II/Camaro
3959512 1962-67 327 2 Was also used for some replacement blocks
3970010 1970-80 350 145-350 2/4 Truck/Passenger/Chevelle/Chevy II/Corvette/Camaro
3970010 1969 302 290 4 Z-28 Camaro
3970010 1969-69 350 255-350 4 Truck/Passenger/Chevelle/Chevy II/Corvette/Camaro
3970014 1970-75 350 2/4
3970014 1968-79 350 only 200 & 255 2/4
3970020 1970-73 307 2
3970024 1969-73 307 2
4715111 1980 305 2
6259425 1969-76 350 2
10036033 350 4 Goodwrench crate motor, 2-piece rear seal, "Hecho en Mexico"
10046164 1986 305
10051182 2/4 Bowtie, 3.75"-4.30" bores, 1 or 2-piece rear seal
10051184 1986-up 350 4 Bowtie, 4.00"-4.155" bores, 1 or 2-piece rear seal
10051184 1986-up 350 N/A 4 1 piece rear main seal. BOWTIE
10054727 1986-up 350 2/4 one piece rear seal, some "Made in Canada"
10066036 350 2/4 Target Master/Goodwrench crate motor, 2-piece rear seal, "Hecho en Mexico"
10066038 1994 350 4 Goodwrench crate motor, 2-piece rear seal, "Hecho en Mexico"
10090511 1990 350 375 2 LT-5, ZR1 Vette, 375hp
10125327 1996-96 350 300 & up 2/4 Gen.II LT-4, reverse flow cooling
10125327 1992-96 350 300 & up 2/4 Gen.II LT-1, reverse flow cooling
10134996 4 Bowtie, Aluminum, 4.125" bore 2.65" main journals
10153558 1991-92 350 375 4 LT-5, ZR1 Vette, 375hp
10168588 1994-96 265 2 L99, Gen.II, 4.3 Liter V-8, Caprice, reverse flow cooling
10199001 1993-95 350 4 LT-5, ZR1 Vette, 405hp
10243878 1996-97 305 2 Vortec truck, roller cam, one-piece rear seal
10243880 1995-00 350 2/4 Gen.I crate motors and "ZZ4", roller cam, one piece rear seal
12550592 1997-99 346 345 crossbolted block, Gen.III, "LS1"
12559378 1998-00 346 345 crossbolted block, Gen.III, "LS1"
12559846 1998-99 346 345 crossbolted block, Gen.III, "LS1"
12560621 1998-98 346 345 crossbolted block, Gen.III, "LS1"
12560626 1998-00 346 345 crossbolted block, Gen.III, "LS1"
12561168 2001-04 346 350-405 crossbolted block, Gen.III, "LS1/LS6"
12562174 1998-98 346 345 crossbolted block, Gen.III, "LS1"
12568952 2005 364 400 "LS2"
14010201 1980-85 305 2
14010202 1980-85 305 2
14010203 1980-85 305 2
14010207 1980-85 350 190 & up 2/4 corvette
14010209 1980-85 350 4
14010280 1979-82 267 2
14011064 1982-86 350 N\A 4 High Tin
14011148 1987-89 350 Roller cam, one-piece rear seal
14016376 1979-82 267 2
14016379 1977-79 350 up to 225 2/4 corvette and others
14016381 1980-84 305 2
14016382 1979-84 305 2
14016383 1980-85 305 2 Truck
14079287 1986-90 350 Truck
14088526 1987-89 350 Roller cam, one-piece rear seal
14088548 1986-88 350 205 & up 2/4 corvette and others
14088551 1986-87 305 2 one-piece rear main seal
14093627 1987-91 305 2 Roller cam, one-piece rear seal
14093638 1987-95 350 2/4 Roller or flat tappet cam one-piece rear seal
14094766 1986-up 305 2 One-piece rear seal
14101148 1987-90 350 4 One-piece rear seal
14101148 1988-up 350 205 & up 2/4 1 piece rear main seal. Late model roller non LT1
14102058 1987-91 305 2 Roller cam, one-piece rear seal
14316379
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

 

 

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