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 for CID 350

Casting Years CID HP Main Notes
140029 1980-84 350 2
366245 1978-82 350 N\A 4 Bowtie High Tin
376450 1978 350 175-220 4 corvette uncertain
460703 1978 350 175-220 4 corvette uncertain
3858618 1968-76 350 2 unverified
3892657 1967 350 295 2 Camaro
3914678 1968 350 295 2 Chevy II/Camaro
3932386 1969 350 300/350 4 Passenger/Chevelle/Chevey II/Corvette/Camaro
3932388 1969 350 Various 2/4 Passenger/Camaro Rare?-NO! See FAQ on site
3956618 1969 350 250-350 2/4 Passenger/Chevelle/Chevy II/Corvette/Camaro
3970010 1970-80 350 145-350 2/4 Truck/Passenger/Chevelle/Chevy II/Corvette/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
6259425 1969-76 350 2
10036033 350 4 Goodwrench crate motor, 2-piece rear seal, "Hecho en Mexico"
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
10153558 1991-92 350 375 4 LT-5, ZR1 Vette, 375hp
10199001 1993-95 350 4 LT-5, ZR1 Vette, 405hp
10243880 1995-00 350 2/4 Gen.I crate motors and "ZZ4", roller cam, one piece rear seal
14010207 1980-85 350 190 & up 2/4 corvette
14010209 1980-85 350 4
14011064 1982-86 350 N\A 4 High Tin
14011148 1987-89 350 Roller cam, one-piece rear seal
14016379 1977-79 350 up to 225 2/4 corvette and others
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
14093638 1987-95 350 2/4 Roller or flat tappet cam one-piece rear seal
14101148 1988-up 350 205 & up 2/4 1 piece rear main seal. Late model roller non LT1
14101148 1987-90 350 4 One-piece rear seal