The water pump sold by most vendors is available with a wide pulley using a 5/8” belt (older engines) or a narrow 3/8” pulley (for 1953 and 1954 engines). Some vendors ask you to specify which one you need. I would not try to swap the pulleys, get the correct one.
Thanks. Looks like American Classic Trucks has the 3/8 belt pulley. I'll try ordering from them. I'm surprised the Carter water pump from Rock Auto didn't have the 3/8 belt pulley since it is specifically for a 1954 Chevy Belair 235 engine.
