Anyone using SB Lunati cam ending in 703 Part number?

nm9stheham said

Not nearly accurate enough for what you are doing. The piston motion at the top is so slow that you can be 5-10 degrees off. Then your ignition timing will be all screwed up....Though it will say if the damper mark is way off or not.

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That makes sense. I am familiar with what a piston stop is and how it works. However I am confused on how to set the proper depth on the stop to confirm that the piston is truly at TDC. Or do I use degree wheel and rotate crank both ways and set the TDC 180 out of true TDC?