Silver,
I had a 1950 Chev one ton and its engine had a similar casting number. I don’t recall the actual casting code, but I do remember that it also started with a C. After much digging, it turned out that it was a low pressure 235.
This question of mine is directed to the rest of the community reading this: At one point, didn’t Stovebolt have a thread going that had an actual engine “search engine” for casting codes? I remember using it, and it was very slick. I can’t find it now.
