Car water pumps in 54 used a 3/8 inch wide belt. Trucks used 5/8" belts, I believe. Is the pulley pressed onto the pump shaft, or does it bolt onto a round flange?

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!