So I was doing some reserch trying to find info on how to determine piston to valve clearance and thought this might be helpful to other members who are running more agressive cams, oversized valves, etc. It directed towards domestics however I think it gives a pretty good idea of the various methods to check pistons to valve clearance. N/E how, here it is.
http://www.fordmuscle.com/fundamentals/pistontovalve/index.shtml
http://www.fordmuscle.com/fundamentals/pistontovalve/index.shtml