Hello, I have a newer water pump that I believe was installed in correctly by the previous owner or a mechanic which has a 5/8 pulley and not 3/8 which would correctly match the balancer and alternator. Is there a source of a 3/8 pulley somewhere or am I stuck buying a whole new water pump with the correct pulley. The pulley is the cast type BTW.

Thanks for the input.

I have a 54 235 1/2 ton chevy