Lee:
Just a hint when you want to see how much difference reducing valve clearance adjustments MIGHT MAKE when testing a engine for hard crank over, electric or manual crank so as to save some time W/O actually adjusting the valve clearance at first is to use a feeler gauge to reduce the clearance first so as to simulate reducing the valve clearance. (insert a selected feeler gauge on top of the valve stem to reduce the clearance)