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.
Engine Block Codes for CID 350
| Casting | Years | CID | HP | Main | Notes |
| 140029 | 1980-84 | 350 | 2 | car | |
| 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 SS |
| 3914678 | 1968 | 350 | 295 | 2 | Chevy II/Camaro SS |
| 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 | 1980-94 | 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 |