What big block Chevy do you have? So I’ve done a little research tonight and James was asking me a few questions. Apparently I have a February 28 of 65 standard bore 409 block, and the 63/409 truck block Both are standard bore. And a August 18 of 65 396. It was also the same block that was used in 66 for the 427. Those cylinder wall thickness on this block is incredible. And I could take it to a 427 easy. 4.250 I have about four or five other big block Chevy’s I need to get the casting numbers off of and I will list them too. I feel fortunate to have a 1965 409 block and a 1965 396 block. Now if I just had my old 65 impala first vehicle. Oh well I’m content with the 63 Belair. Tell us what you have laying round and what your dream is.