Early (65-74) MoPar Small Block Casting Numbers

Standard

On the slant six engines these numbers can be found on the passenger side of the block just below the head. For V8 engines these numbers can be found on the drivers side front of the block just below the head.

The engine casting number for the most part includes the build year and the engine displacement. It may also have an assembly date. The twist to decoding the assembly date may be as simple as 3-15 (March 15th), or based on the 10,000 day calendar (2787 = March 15 1969).

The letter before the number indicates the year
A=1965  B=1966 C=1967 D=1968 E=1969 F=1970 G=1971 H=1972 
J=1973  4=1974
Example: B-273-A24 reads as a 1966 block with a displacement of 273 and built on October 24th

Block Casting Numbers
Slant Six
Casting No CID Year Family
2202843 170   G
2205630 170   G
2264478 170   G
2463230 170 65 G
******* 198   G
2202857 225   RG
2205528 225   RG
2463430 225   RG
2806830 225   RG
V Eights
Casting No CID Year Family
2465330 273 64-66 LA
2536130 273 65 LA
2466090 318   LA
2536030-318 318 67-75 LA
2566080 318   LA
2806030 318 67-74 LA
2780930-340 340 68-73 LA
3577130TA-340 340 70-71 LA (Trans-Am)
3418496-360 360 71-74 LA
3870230 360 75 & UP LA
Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

w

Connecting to %s