Need advice 360 timing chain cam/crank slightly off

George Jets said

Looks like the engine builder tried to advance the cam 4° by jumping the cam gear a couple of teeth.

Little does the engine builder know that any advance has been ground into that performance cam already and it should be installed dots at 12 O'clock.

Click to expand...

What if the tolerances in the cam and crank sprockets are off in opposite directions? What if they are also off as compared to the crank and camshaft keyways? This is the whole purpose of degreeing a camshaft. To make up for all those possible discrepancies. No way in the world will I just ever install dots at 12 o'clock. I've seen one off by 13 degrees dot to dot.