[Bob Arthur]

Will the March 13032 water pump pulley (6.130 dia) work on my 8 bolt water pump. I believe that the pulley is offset the same for either 4 or 4 1/2 inch pumps. Has anyone done this? I don't have a 4 1/2 pulley for comparison. The Crank pulley is set back for the 4 inch pump. Part desciptions at Summit and March websites are ambiguous. I was considering changing over to the 11 bolt timing cover so I could use Ram Air Restoration"s 6.5 inch dia offset ( to match the 4 inch pump) pulley. But this would accomplish the same thing if the offset is correct.