If somebody insists on doing a running clearance check for some reason, at least try to find one of the Snap-On GO/NOGO feeler gauges with a .002" step-up about 1/2" behind the tip of the feeler gauge blade, for instance .010"-.012" on the same blade. Those gauges were designed to simplify valve adjustments, as it's easy to tell when the adjustment is right.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!