Ok folks - I'm moving closer to the air install. Now I need a two groove water pump pulley for a 250 cu in '66 (no air or power steering). I believe the correct GM part number is 3854031 and there are a couple on Ebay. Does anyone have a way to verify that part number for me? Thanks - Tim-o
I have a couple inline engines and at least three double groove fan/water pump pulleys laying around. What diameter are you looking for?