[Stewart Way]

I am far from an expert on this but I'll throw this out for comment. Your checking head and your race head appear to be different enough to make a difference in the set up angle between the valve centerline and the rocker intersect line. If one head is cut more or angle milled I would think you would see a difference in valve lift. What I don't understand is how you can use 3 different length pushrods and not get some difference in lift.