Here is a very good link with lots of pictures to help you find the casting numbers, cast date codes, and serial numbers on your I6.

http://1954advance-design.com/Web%20images/casting-code-photos/low-press-codes-ser-nums.html

Once you have that info you can use other sources to check to confirm what that info relates to.

Post more pictures and we can try and help more.

Last edited by Gdads51; 02/22/2023 8:50 PM.

~ Dan
1951 Chevy 3 window 3100
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