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I was referring to an 110 volt operated torque to the crank... which can be controlled to a degree of accuracy.... I have never found bumping the starter accurate enough for me unless one were willing to make multiple passes.
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It seems that some on this forum (Leathermang and others) think that the only place one can get a good valve clearance reading is when the cam lobe is pointed straight up (exactly). I don't believe there is an engineering basis for this belief, as a cam is perfectly round on the back 180 degrees. That said, you can check several valves without rotating the engine. I have proved this for myself by taking several measurements of the valve clearance with the cam lobe at various angles....it makes no differance as long as the you are measuring somewhere on the side opposite of the cam lobe. This logic would also imply that bumping the engine with the starter is plenty accurate enough for valve adjustments...and in paractice only 2 or 3 bumps is enough to cover all of the valves. This is coming from one who is known as a classic perfectionist, but the understanding of the way cams are designed has freed me from the onerous ritual of adjusting a valve only with the lobe 180 degrees from the valve stem.
My $.02 worth.