Oil Pump

If rod and main bearing clearances meet or exceed .002", rocker arms have been converted to full time oiling, lifter bores are worn or have been honed, a HV pump is a good idea. If max RPM is in excess of 6000 RPM a high pressure spring should be installed in the HV pump.
Who is this Seinfeld? Does he race a Dodge? Whoever he is what the heck does he have to do with high performance mopar engines? Yes I live in a cave, a mopar cave.
As to how many HP it takes to turn a HV pump with a HP spring in it bear in mind you can spin the intermediate shaft during priming with cold oil using a Dewalt hand drill. If it took any appreciable power to do so you would break your wrist which obviously doesn't happen. How many horsepower can you hang onto with your hand? Perhaps 1/50th The actual power used is measured in the very low fractional horsepower range.
If there is any concern over "sucking a pan dry" it is time to use a windage tray/scraper and/or a six or eight quart baffled pan to accommodate the increased flow. Simple common sense hydraulic stuff.