Early (60-74) MoPar Block Casting Numbers

Standard

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 3.15.69 or 3-15-69 (March 15th 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  K or 4=1974 L or 5=1975 M or 6-1976 N or 7=1977
Example: EH426 reads as a 1969 Hemi block with a displacement of 426

 

B Family Family Big Block Casting Numbers
Casting No CID Year Family
2120229 361   B (Industrial)
2205712 361 58-66 B
2468130 383 59-71 B
3614230 400 71-72 B
3698630 400 73-78 B
4006530-400-12 400 76-78 B

 

RB Big Block Block Casting Numbers
Casting No CID Year Family
1852029 413 62 RB (Max Wedge)
2120529 413 59-65 RB
2205697 413 59-65 RB (Pass Car)
2468030 413   RB
2406730 426 63-65 RB (Wedge)
2468330 426 64-71 RB (Hemi)
2658836 426   RB (Industrial)
2536430 440 66-72 RB
3698830-440 440 73-78 RB
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4 thoughts on “Early (60-74) MoPar Block Casting Numbers

  1. mike koelzer

    I have a engine block I found in a storage unit. The numbers are 3698630-400-4, can you tell me about this block, and it’s value?

  2. Matt

    I have a Chrysler motor with number on the block 2264229. I’ve been told it’s a (1963 a 313 ). Can anybody back this up . Cheers

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