This will fit most years 1942, 1946, 1947, 1948, 1949, 1950, 1951, 1952, 1953 Chevrolet cars and trucks. I have pump #839403 with pulley. The thermostat housing is now gone. I also have the fan blade but it looks to have a bend to it. Pump turns free needs rebuild. They were taken from a truck found in the desert. Perfect core to have as a spare. $25.00