Inliners International Forums General Discussion Engines Casting number question, I apologize up front :)

Hi Vector.
This is a good one. A nice mix of parts from different eras like a '62-'63 valve cover, pre '68 head. I'm thinking you have a '70s era block, which would make it a 250. What's the casting number behind the dipstick? I think I see a 4 as the last digit.