HV oil pump vs Stock oil pan

I have noticed in xtreme heat that the oil pressure on my LA 340 drops to 15-18 psi at idle while in gear. 10W-40 Dino oil, Wix filter
I am wanting to up the idle oil pressure via a high volume Melling oil pump M-72-HV.
Has anyone run a HV Melling pump with the stock 5 quart oil pan?
Ya hear the stories of "sucking the pan dry" with high volume oil pumps.
Keep in mind this engine is a street application with a rev limiter setting of 6500 rpm.

I ran one with the high pressure spring and windage tray in the 64 Barracuda daily driver for years. 273, spun to 3,000 rpm minimum, 6,500 rpm power shifts, sometimes past 7,000 rpm by accident or incompetence, 100,000 miles on it minimum. No problem. I always run 20w-50 or straight 30 Valvoline VR-1 since the 70's.