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Old rule of thumb is 10 psi per 1000 rpm hot. Every 90 degree fitting reduced oil pressure by 5 psi - check your routing and fittings - try to eliminate as many 90’s as possible. Then there’s always an Accusump if you’re seriously worried about momentary loss of pressure. Definitely need a High volume pump to make up for extended oil galleys.
Oils come a hell of a long way since the 10 lb per thousand rule. Doesn't really apply with today's synthetics, I shoot for an operating range rather than a specific psi at rpm. The amount of breath I've wasted with people requiring 66lbs of oil pressure at 6600 rpm is mind numbing.
 
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