Valve to piston clearance

Post 24 has the most accurate way to check it. The tightest clearance usually occurs right at 10 degrees before top dead center for one lobe, and 10 degrees after top dead center on the other lobe. I forget which lobe is before and which is after, so check both lobes at both spots.
The only thing this method does not check is radial clearance, but that can be checked another way if the heads are not final torqued already.