Shims ? Why do you need shims ? No such thing. Like Rick said --2 paper gaskets, and a " stand off". Are you trying to put a late angle pump (to clear alt.)instead of the" straight up " old model pump ? The pump push rods are different lenghts . Does this car have the original engine/ with a Gen. ? Old model pump uses the longer rod. If you try to use the long rod on a "angle "pump ,its a good chance you have already knocked the bottom out of the pump.
