oil pumps,,high pressure,high volume,both?

So long as the clearances on the mains are good the stock pump is fine for volume but the factory pump bypasses at about 50-55psi. So what I use is the MP high pressure spring pkg so the bypass is raised to 65-70psi. I also use the MP oil pump drive as raising the pressure or volume can easilly overload the oil pump drive and shear or spin the gear on a stock one.

The "HP" high pressure pumps have the smaller volume but that higher pressure potential.

The "HV" high volume pumps have the higher volume and the higher bypass pressure potential. This one MUST use a good oil pump drive.

I use HV pumps when the clearances are unknown. Everything else uses a stock displacement pump.