If your oil pump has not been disassembled, you are looking for a pointed bolt that screws in from inside the block. If I remember right, it's got a 1/2" hex head (maybe a 7/16") and a lock nut of the same size on it. Look down inside the block along side where the oil pump shaft is inserted and you will find either the hole where this bolt screws in, or you'll see the bolt. The point of the bolt will go into a location on the oil pump shaft and hold it in place once it is in position. You will want to loosely attach the oil line to the pump before you tighten everything down. Once tightened, if you try to put on the oil line, you will probably find it is a very tight fit. Good luck. Hope this helps.
