Rebuilt engine initial fiasco

Why 20W50 oil for break-in? Takes longer when cold to get flowing everywhere, especially with this cooler fall weather..... like to the cam where it is needed! I'd dump that right away and get some lighter BradPenn oil.

I think you are going to be alright once you get it going again. A LOT of cams break-in fine with suboptimum break-in. Do you have a high lift cam or cam like a Voodoo or a Comp XE, or some particularly high pressure valve springs?