That's one of the things I'm struggling with! I replaced the pump 15 years ago and I just slipped it in and it worked. I am still trying to get accurate info on what's driving the pump. Pontiacs do not have a pin like Chevys that drive it. I read somewhere there's a follower attached to the timing chain??? Or a lop on the cam? So far I replaced the sending unit filter, blew out all the lines, blew air into the fuel line on the fuel pump. I just can't get any fuel to the carb. I bench tested the pump and know it's good. It worked before I parked the car, so I would think whatever drives the pump is not worn. I can't feel anything in the timing cover hole that operates the pump and cannot think of a trick to install any different. Frustrating!!!
