Welcome to the 'Bolt!' I'm kind of a rookie at this myself, but so far the only thing I have found that is close to your block number is 3692708 or 3692703 and these are both 235's from 50-52. I'm sure if somebody else finds more accurate info they will pass it along to you. I'll try looking up the head number now, but I can't remember where I had to go to look up mine. I'll let you know if I find anything.
Dave grin


The only thing more amazing than my ability to cram 60 minutes of work into a 9 hour day is my talent for making it look effortless!

My 1962 Chevy C-30