Adjustable rocker clearance specs?

Yeah Im kinda suprised the FSM has no specs, the rocker tip stays on the valve, but seems a little loose.
I have only measured the one pair, but to go from .074 to .020 is .054, call that 4 @0.015 approx, so 16 per shaft?? So I would need a few sets from Summit(10 per kit).
I saw Hughes has them also, I wonder if new spacers is the way to go??