Clois Harlan Check Smith brothers for your pushrods, I think they are cheaper that crane, and get the correct lenght also. If the block has been squared and the heads slaved to be trued than the length on the pushrod could be too long and the rocker is not pushing on the center of the valve. Clois I know you autocross and roadrace, How big is this cam? You would be better to go with a cam that matches the max flow of your heads, bigger cam is not always better. What is the biggest track you are racing and what is the max rpm? Build a 500 motor with 10.5 to one compession. 600lbs tork 500hp 6750 rpm max, you will have an endurance motor that will last all season with a little maintainance. Drinking cool ones with Lew is better than wrenching after every run.
Change the rear ratio to match the max rpm and the tracks longest straight run. If you are going to more racing get rid of the windshield and get a short lexan race shield. You could pivot the windshield on the mounts like they did in the old days. My two cents
Rick Lake