Another thing I was thinking of, was wouldn't you NOT want too much overlap at 0.050"? Since the headgasket is only 0.051" thick, and the piston sits 0.012" out of the hole, that leaves 0.039 clearance piston-to head at TDC, so if the valves (all 4, since there is overlap) are open 0.050" or more, they would be contacting the pistons (not sure how much extra clearance there is, factoring in the dish and valve reliefs, but that would put them 0.011" inside the piston face... Even worse if you have a shaved head.
Edit:
I forgot the dish is like 0.060" but things have got to be getting pretty close together at that point.
Then if you have the head shaved 0.040" you only have 0.010" clearance to the bottom of the dish.
Better hope you have no overlap at 0.060"
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