The water pump, which I believe is original, on my 1954 Chev 235 Hydra-Matic pickup has a casting number of
"GM 2932 A" under the pulley on the ramp of the housing. There are no other numbers on the body. Generally, I see early 1950s 216/235 water pumps with the casting number "839403" on the radiator hose inlet. Can anyone shed some light on my pump number?