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.