Ray, sounds like you found an engine builder like just Terry Pennington use to have. Every time the car went to the track it was a crap shoot on how many runs he could make before it started blowing oil. Each time he took the engine back there was a pile of "$$ tricker than trick $$" parts waiting that were promised to cure the problem. The engine builder even ground all the i.d. marks off the pistons and cam. After three years of this
Terry finally pulled the engine apart himself and found that the ring grooves weren't right for the special made rings, and the rings were sticking in the bottom of the grooves. How could an engine builder miss that every time he tore the engine down?? No wonder the engine was detonating and blowing oil. Bottom line was finding an engine builder that was through and competent, and not using his customers as an unpaid
test bench. Good luck.