I can only comment on my own personal experience.

After wearing out 2-3 camshafts from Clifford including the new distributer gears quickly.
Also did the same on an American racing cam.

I decided to install a standard volume Mellings oil pump.
Same engine,I just dropped the pan in the car,installed a new standard Mellings pump & installed a new dizzy gear again.

I never had a problem with wearing out the drive on the camshaft & never had to change distributer gears.

Maybe I had something else going on?

Those are the reasons I just run standared volume pumps,also IIRC, Mike Kirby told me a standard pump is fine to use.

Maybe on my new engine I might try a HV pump again,,
Just a glutton for punishment?


MBHD

12 port SDS EFI