Stock? Hi Pressure? Hi Volume?

I run a moroso pan on my duster with drag tosion bars in the front. I never had a ground clearance ussue with it. I ran high volume pumps on the street and had pressure to high until its warms up. From what you said your engine is use the stock pump. My last street engine i built i used a 70 340 motor 30 over 509 mp cam stock valve train ,stock oil pump ,pan, pick up. turned 6500 rpm at strip for 100 plus passes at the track. with no problems. Harry