Weird ? about small block pulleys

If the water pump pulley is ( just a number) 6 inch dia and the crank pulley is also 6 inches in dia then you water pump will be one to one. If the crank pulley is larger dia than the water pump will be over driven by an amount. If the crank pulley is smaller than 6 inches the water pump will be under driven.


As for the alternator a 2.5" dia pulley to 3" with a 6 inch crank pulley it will charge ok.


So what size pulley combinations do you have?

And do they line up properly?