We happen to be the only company to consider "Reengineering" the press in stud rocker arm stud for early years. In the early heads the Rocker Arm Studs were Press In fit. In other words they were knocked into the head or pushed down a slightly smaller hole with a hydraulic press. We make Threaded Base Studs to Thread into the head and Eliminate the Press In Option. Of course we also upgrade the upper diameter of the stud to 7/16ths
