May I suggest reading this link, about oil drain back lines to keep the oil in the pan instead of on top of the cylinder heads. If you're leaving most of the oil on top of the cylinder heads you're effectively running the pan down a couple quarts as soon as the engine is run at high RPM because of drain back restriction. No matter how the pan is baffled, it won't work if the majority of the oil is in the top end of the engine.
Link:
https://forums.maxperformanceinc.com...39#post5563539
I have no idea what cylinder heads you're running, but the aftermarket heads (Edelbrock, KRE) don't return oil to the pan nearly as quickly as the OEM cast iron heads do.
The thread also talks about restricting the oil flow through .080 restricted pushrods to keep from filling the cylinder heads. This same thing can be accomplished by installing restrictors in the lifter bore feed holes.
Hopefully this will show some results for your problem.
I'm fairly certain that the remote oil filter system isn't going to show any difference, but if you want to eliminate it completely and try running the engine with no filter whatsoever the Pontiac engineers made a filter elimination casting to run Stratostreak engines with no oil filter.
You would have to fashion your own by pass plate to aid in your troubleshooting because they were few and far between, and of course GM doesn't sell them any longer. You could use a by pass oil filter, eliminate the full flow filter completely, and have zero restriction between the pump and the internally oiled engine parts. You'll also have much cleaner oil over a full flow filter too. You're the owner so the decision would be yours.
Something else I thought about, is your bypass valve operational, or is it blocked? For some reason people think it's a good ides to block the by pass valve and render it inoperable. With a single OEM filter the oil pressure can crush the filter media and make it more restrictive, or actually tear the media paper. I don't subscribe to this theory of blocking the bypass valve, and have never done it on any of the engines I've built for racing or street use.