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?