Jay How much room is in the valve cover from the top of the adjuster to the inside surface of the valve cover?? Gun drilling the hole in the center of the adjuster weakens it every time. Look where it snapped. I don't believe that you are King Kong and over tighten that adjuster. At this time before you start running this engine and possible have another issue with rockers Have either ARP or find a machine shop that will make an adjuster with a square top head. No drilling an internal hole. That Allen head will break off from the drilling being too deep over time. I wish you alot of luck with this motor. I am hoping for 840 with it running right. Anything onthe book?? Rick L
