oil pump

Sorry I should of given more info. This is a existing engine. I lost the cam and it trashed the oil pump. Bearings look ok so I was just going to replace the hv pump with a standard one be cause I have a new one on the shelf. I've always used hv pumps but been reading that a lot of people say its a waste of hp and not needed. Motor has seen 7000 many times. Shift point is 6700 but love the sound at 7000.