Thanks for the feedback.
Goldstar-I'll answer your questions. I pretty much followed the (Power Manual) in building the engine. It was recommended to block off the bypass system of the oil circuit and run the high volume oil pump. I am running a Clifford cam and they also recommend the high volume pump. The rpm range is between the 6 and 7 thou. range. The engine would achieve and hold the 6000 range with no problems. I forgot to mention that the engine is in a pull tractor. Weight class was in the 4000lb. class. I run a synthetic blend 20/50 oil. I am not concerned what the pressure is as long it is a constant pressure. It was the decline in pressure and then the oil leak, that I have become concerned over.
Would the pressure wear out the rear main bearing? When I tear it down should I expect all of the mains to be worn? The pressure goes to the cam first and then to the mains, should I also expect to find those bearings worn? Thanks for the feedback.