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I was wondering if you ever figured this one out, knowing that if you did, we would all learn something.

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Well I got the burning cup issue to go away. On a whim, I changed oil pump relief springs. I had cut one down, to lower pressure. Pressure was more than enough with the cut spring. 50ish lbs at idle. After I changed spring, pressure is mid 60s at idle. The issue went away. Seems crazy to need that much pressure to stop the issue.

I did have a groove put in my cam. It gets more oil to the top, although not a major amount more.

I have a 470 on the stand that will have a roller cam in it. I did the valley mods/installed a restrictor on it to get full time oiling. I'll see how that works.