Re: Higher than normal oil pressure
Too much oil pressure can wipe out the babbit layer - bad news.
Run a lighter weight oil, as suggested, and I did in my '68, 10W30.
As oil gets dirtier, the thicker it becomes.
When I had my '68, I had journal clearance at 0.002", a high volume pump, and ran at the most 60 PSIG at 6K rpm, 15 PSIG at hot idle. No knocks here.
Also, a mechanical gauge works very well.
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