Could the oil be foaming from cruising from 3000 rpm? There was a slight mismatch in the heads return ports to block. Found it after shortblock was together and we didnt think it was too bad, maybe 1/4 to 1/3 of hole. I think i will get some restrictor pushrods and then work on the heads return passages. If motor comes out i am going to tighten mains to 2.5-3 thousands and tighten rods and install a stock pump. Maybe makes some oil control in pan. Sound like i am on the right track? I really rather not run a accumulater , but i will consider it..., ED