[tempest66]

Hey guys, i'm new to this forum so hello there! I have a 1966 Pontiac tempest. Original trans and motor. I replaced a few things (carb, intake, camshaft, lifters pushrods),, the car runs pretty well but the issue i am having is when your driving around everything is fine upshifts fine but when you come to a stop(either a stop sign or red light) there is a nice heavy bang at approx 10 mph. I replaced the vacuum modulator and still the same thing. Anyone every experiance this situation or have any pointers for me? Any advice is greatly appreciated. Thanks