Stock? Hi Pressure? Hi Volume?

Harry, we agree.
There really is no need for an HV/HP pump, even in the harshest of conditions.
I've found through many trials and errors, some my own, some not, that the closer you keep to 70 PSI as a MAXIMUM pressure (6500-7000 RPM max engine speed), with an idle pressure of around 20, normal engine temp of 190-200 degrees, there will be no problems.

There is such a thing as too much oil pressure, remember, most of the oil passages in an engine are sharp bends and sharp bends tend to cause oiling issues, which compound as oil pressure and volume goes up.

While the guage reads high, 80 psi plus, the oil can actually do damage to bearings at high pressure, this is called bearing erosion.

Stock pump + Stock pan = no oiling issues.

Mark.