I am at my wits end.

I finally had some success. I took the oil pan and oil pump off again. The oil pump was fine but the oil pump drive shaft was broken right at the top of the fitting on the oil pump. Luckily I had a spare. I also used a couple of stock bolts on the rear main just to make sure there were no more problems. I checked a couple of the mains to see if there was any damage to the bearings and they look great. I reassembled everything and turned the key. It fired before the engine turned one turn. My oil pressure is rock solid at 56 psi. I finished breaking the cam in, cured a couple of small fuel fitting leaks and called it a day.

Jack