Hi from NW Washington. Thank you for this casual forum- I've been away from cars as a hobby since college years, but now the kids are all married and I figured it was time to get back to something I loved since I was pushing toys across the floor on my hands and knees. I just bought a 50 Dodge Coronet Club Coupe, in pieces, with a parts car. The fun begins. I plan to go with a small block Mopar and lower it, after, of course, the requisite rust repair, etc. So I'll start with a question. The flathead that came with it has a number stamped on the block of IND5A257570. It's on the left side, between cyl 1 & 2, right where the number is supposed to be. I can't find ID for that. Can anyone help?