In Reply to: 641 year posted by Chris on February 11, 2021 at 04:01:51:
All these guys have offered very good info and advice. I'll add too that I often tell fellas not to bother with an engine serial number as it only ID's the block, and parts may not be as were originally. You can make a note on the s/n but it is always best to inspect which parts you have now before buying anything. Many time guys buy overhaul kits before tearing down block only to discover later parts were changed previously and have to return and get correct ones. The diamond symbols in the s/n were changed when Ford went to cast iron cylinder liners in late 1951 on the 8N model and never went back to steel. He diamond means nothing now as all cylinder sleeves are made in cast iron.