NGINE BLOCKS
Casting numbers for the small-block Mopar and big-block Mopar engine blocks can be found on the left (driver’s) side of the block, and will consist of seven numerals. These numbers are different than the stamped eight-digit number found on the right side of the engine. That number is the last eight digits of the Vehicle Identification Number. When identifying the block, you want the raised seven-digit number, not the stamped eight-digit number.
View attachment 1716059049
An example of an engine block casting number. In this case, 3698330 – an RB-series 440 cubic-inch block, cast June 28, 1973.
Small-Block Mopar Engine Block Casting Numbers
2264230 – 1960-1967, 318 A-series small-block
2463252 – 273 LA-series small-block
2465330 – 1964-1966, 273 LA-series small-block
2466090 – 318 LA-series small-block
2468230 – 318 A-series small-block
2532630 – 318 A-series small-block
2536030 – 1967-75, 318 LA-series small-block
2536130 – 1965, 273 LA-series small-block
2566080 – 318 LA-series small-block
2780930 – 1968-1973, 340 LA-series small-block, Not T/A or AAR
2806030 – 1966-1969, 273 LA-series small-block
2806030 – 1961-1974, 318 LA-series small-block
2806130 – 1965-1969, 273 LA-series small-block
3418496 – 1971-1974, 360 LA-series small-block
3577130TA – 1970-1971, 340 LA-series small-block, T/A and AAR
3810230 – 1975-1978, 360 LA-series small-block
4104230 – 318 LA -series small-block, Race Engine
4179930 – 1975 – 1993, 360 LA-series small-block