HV pumps are not needed for a engine set up for street driving period. If you are building a NASCAR motor designed for 500 miles of use before it is rebuilt or a drag motor a HV pump will in most cases cause you engine failure. Most street motors are set up with fairly tight tollerances but race motors are built loose so they will turn more rpm and they depend on the
oil to fill the extera gap in the bearings.
I have a friend that ruined two 460 fords by using a HV pump. HE did what was described above, filled the valve covers with
oil and starved the bearings.
A motor built for a HV pump will not live long on the street. You could probably get a few thousand miles out of a motor built for drag racing or NASCAR racing. Now a motor built for 24 hours of Daytona will be closer to a street motor in bearing tollerance but it will have
oil restrictors, bigger drain back holes and a dry sump system with several gallons of oil.