The 10-20-66 is the casting date. That would be a 67 block I would imagine. The hand stamps on the block I don't know for sure but the 0273 is obvious. The 12-21 may be when the engine was assembled (December 21)
Yes that is what we agreed it was in 67 273 and by the way what looks like an o is a C273 and I was told the C ment it was a 67 year model. My question is what's up with the 3 3 0 - 3 on Lee's block
