Can you get the casting date from over the starter? That will pin the year for sure. But here's what I have; It's a '57-'60 passenger car 235, manual trans, Flint plant. There is a possibility that it may be up to a '62, my bokk does not go up past '60 on passenger cars as it is primarily a truck guide. Only covers passenger cars due to the Sedan Delivery/El Camino.
LONGBOX55- The casting # I listed as
"Cyl Block Casting #"is the casting # above the starter. Did I write it wrong?