Small Block Mopar Cylinder Head Casting Numbers

There are basically only two different cylinder heads that have been used on
the “LA” engines from 1964 to 1984 a small port 273-318 and a big port
340-360.

Casting Number Chamber Vol. Intake Valve Exhaust Valve Comments
2532080 1.78 1.5 1964-65 273
2536178 1.78 1.5 1966 273 Early
2658234 1.78 1.5 1966 273 Late
2268341 1.84 1.56 1962 318 Early; 1962-67 318 Late/CC 318
3671587 65cc-73cc 1.88 1.6 1973 360 w/air pump; 1973 340; 1974 360
3462598 63cc-73.5cc 340 Trans Am
2843675 1.78 1.5 1968-69 273; 1968-74 318
2531894 2.02 1.6 1968-70 340
3418915 65cc-73cc 1.88 1.6 1971-72 340; 1970-72 360
3418915 63cc-73.5cc 2.02 1.6 1970 340
2658920 1.88 1.5 1966 273 4-bbl
2658920 1.78 1.5 1966-67 273; 1966 273 4-bbl; 1967 273-318
2465315 1964-1965 273
2536178 1966 273
2658920 1967 273/318
2843675 1968-1971 318
2531894 1968-1971 340
1970 340-6 MI. T/A 3418915
1971 360 3418915
1972 318 2843675
1972 340/360 3671587
1973-1974 318 2843675
1973-1974 340/360 3671587
1973 360 w/air pump 3671587
1975 318 3769973
1975 360 3769974
1976 318 3769973
1976 360 3671587, 3769974
1977-1979 318 4027163, 4027593
360 4027596, 4071051
1980 318 4027163, 4027593
4027596, 4071051 360
4027163, 4027593 1981-82 Standard 318
4027596, 4071051 High Performance 318

1 Comment »

  1. Jim said,
    October 13, 2012 @ 4:55 pm

    This is an excellent site

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