http://devestechnet.com/Home/CastingNumbers

https://www.stovebolt.com/ubbthreads/ubbthreads.php/topics/512127/casting-numbers.html

Suggest you also get the cylinder head casting number, on intake side outside of the valve cover... I have 2 engines with casting number 3837004. Both are 235s, but I understand that this block could also have been used as a 261 in later years. The conv # indicates a casting date of Oct.18, 1956. You may have an error in reading the distributor pad stamped number... the T indicates Tonawanda engine plant, the A at the end indicates a 3 speed car engine originally. I suspect that the 2nd digit is not a T but a 1, so T1023A would be Tonawanda built Oct. 23 for a 3 speed passenger car. Others may correct me (okay) or have more info.

Last edited by Steve J; 11/21/2022 3:08 AM.

1953 Chevrolet 3100