I also used to run the M54F pump on my old motor and did not like how high the oil pressure was, now I am running a M54D pump shimmed with a washer (just a standard washer that will fit in cap that holds the spring in). With .0025-.003 rod and main clearance I have 20 psi hot at idle with 10W40 oil. Running 20W50 I had closer to 30 psi at idle. At high RPM it is putting out about 70 psi. Based on my experience I think the M54D pump will be fine.
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