would the water pump pulley size also be different with the 5 and 6 blade fan blades (as compared to 4 blade fans)... or asked another way... were 5 and 6 blade fans run at lower rpm than the 4 blade fans?
Old Truck addict 1950 chevy 1 ton napco 1956 gmc 1 ton dually napco 1954 chevy 3/4 ton napco 1957 gmc civil defense napco panel
