Left head varies by .05625”, the right by .075” (Combined was .0813”) Straight edge across both heads, right head all exhausts were .030”-.045” lower than the intakes and the left all the intakes are .027”-.030” lower than the exhausts. Then add the rockers . Crazy! I’ve never seen “new” heads so uneven. Get what you pay for (Black Friday sale) Swapping around rockers worked on four valves, swapping a couple others saw no appreciable changes. Now that all the rockers are corrected they all at least fit the shafts as they should. The 16 pushrods are only $112 shipped