The "Throw Away 318"

The problem with a HV pump is its sucking thru a 3/8" straw, then pushing thru a 7/16" straw. They always come with a High Pressure spring too.

This wastes a few horses just driving the pump.

In a 273 that had major copper showing on all bottom bearings, both Rods and Mains, we ran a HV Melling just to get the engine another 2,000 home. with straight 30 weight oil we had 60 PSI hot idle and 80+ PSI at 3500 RPM.