As far as oil pressure goes with correct bearing clearances and proper crankshaft main bearing alignment, correctly sized rod big ends, and correctly assembled the stock pump with the 60psi spring is more than adequate for what you are doing.
Even on the higher HP builds we've done, several over 700hp the stock Melling pump was used and we've never had a single issue anyplace related to bearings or engine failure due to a pressure lubricated parts. Matter of fact the only engine I've ever lost was a "high-end" build before the aftermarket blocks were available and it broke a piece of lifter bore off the block even with a brace in it. The problem with that engine, IMHO was that the camshaft was just too big and aggressive and side loading things beyond the capabilities of the lifter bore design. It had previously led a good life for over 10 years at a lower power level with a pretty hefty flat solid camshaft in it pushing the car to low 10's. The solid roller upgrade with a butt-ton more spring pressure and super aggressive lobes was good for 17 drag strip runs before it gave up, and the aftermath wasn't pretty!........Cliff
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https://cliffshighperformance.com/
73 Ventura, SOLD 455, 3740lbs, 11.30's at 120mph, 1977 Pontiac Q-jet, HO intake, HEI, 10" converter, 3.42 gears, DOT's, 7.20's at 96mph and still WAY under the roll bar rule. Best ET to date 7.18 at 97MPH (1/8th mile),
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