thank you for your quick response, but I do not think that is correct for 1948. My radiator has a flange, and the overflow is on the neck. The book calls for a 4lb cap, but the raditor cap for a 1958 chevy is an 8lb cap. So I trying to determine if I put a higher rated cap on this radiator if it will cause any damage.
I think 1941 is the last year of a zero pressure radiator. (but as usual, I could be wrong, that's why I'm posting the question)
