The pump I currently have is on the driver side..is there an advantage to a pass side pump..most of the cars I found had a pass side. Im thinking since my motor was a truck motor originally that is why the driver side and that is the replacement that was purchased.
This difference is going to be the depth of the pulley. Cast pump with have a shallower pulley, where the aluminum will be deeper. I have a 3 groove pulley for a cast driverside pump. Pm me if interested