Engine decoding

RB, B, LA Engine Casting Numbers
The block casting numbers for all RB, B, and LA engines are found on the left (driver) side of the block. In addition, on 1968 and later engines the numbers stamped on the lower rail of the engines right (passenger) side match the last 8 digits of the cars vehicle identification number.

Casting Number on LH Side of Engine VIN Number Stamped on RH Engine Pad

Casting Number CID Year Type Remarks
2465330 273 1964-66 LA
2536130 273 1965 LA
2466090 318 1967-74 LA
2806030 318 1967-74 LA
2536030 318 1967-75 LA
2566080 318 LA
2780930 340 1968-73 LA Except T/A & AAR
3577130TA 340 - 6 bbl 1970 LA T/A & AAR
3418496 360 1971-74 LA
3870230 360 1975- LA
1737629 361 1961-64 B
2120329 361 1958-66 B
2205712 361 1958-66 B
2120229 361 B Industrial
1852029 413 1962 RB Max Perf. & Truck
2120529 413 1959-65 RB
2205697 413 1959-65 RB Passenger Car
2468030 413 RB
2205697 426 1964 RB Passenger Car
2406730 426 1963-65 RB Wedge & Max Perf.
1851729 383 1959-64 B
2120329 383 1959-64 B
2568130 383 1959-71 B
2468330 426 1964-71 RB Hemi Head
2532230 426 1964-66 RB Wedge & Max Perf.
2536430 440 1966-72 RB
2658836 426 RB Industrial
3614230 400 1971-72 B
3698630 400 1973-78 RB
3698830 440 1973-78 RB
4006530 400 1976-78 B
4006630 440 1978 RB