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One thing that Bob and George noticed was that when the rocker arms were installed, two of them were put in wrong. As the rocker sits on the stud there is a flat part and a round part on the Trunnion. The rounded part sits on the bottom, and the flat part of the Trunnion is where the adjusting nut sits. As it turned out two of them were upside-down. Needless to say, that was remedied rather quickly. After that, the lash was set and these heads were done and out of the way.