Ray did you check actual valve lift with real springs, check springs or just theoretical at the lobe?
Just the lobe..... and base circle , with rocker shaft flex and pre-load in the lifter I would think actual lift is some where in the .560 range, I think pre-load is .060-080 I can't imagine that it would lose more than .01-02 of actual lift in a running engine. I could be wrong I'm a parts assembler when it comes to engines , not builder like some of the guys ...... I know the stock shaft can flex up .0.010
