The lifters that were in the engine in thier current state cannot allow oil through them and get through the pushrods, there is no possible way they could. I measured how far down in the bore that restrictor disk sits inside the liftet and then, I measured the the pushrod cup. The pushrod cup is actually .003" taller. This means the pushrod is always pushing down on that restrictor disk. I have so many unanswered questions about this like, how did this thing live for 10,000ish miles and, not destroy a single thing? What would be the application of this style lifter? At this point I don't know as if any of the answers to these questions will ever be found. I will be happy to have hopefully figured out the issue and have this thing back on the road.