Pontiac V8 Engine Crankshaft
201874Pontiac heads like the 6X and practically all other production Pontiac heads likely to be used in a performanceorientated build originally had screw in bottleneck studs and steel guideplates. There are some exceptions to this like heads having pressed in bottleneck studs and the Ram Air IV and Ram Air II round port heads which used a straight 716 stud with an adjuster nutlock nut