Well, that was apparently the problem. As proof of principle I got a length of heater hose and vented the valve cover overboard. Worked like a charm. Cleaned the engine, there was oil everywhere, and it looks as if the rear main seal has also stopped leaking! I will run it a few days more then order the differential pressure valve and tubing/hosing/fittings to get it back to stock. I may even put the belly boards back on. I sincerely appreciate all the help. I could not have found the problem without you guys.
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