Although a restriction would increase
oil pressure, as Bob has suggested, it is improbable
but not impossible to have that occur in a brand-new crate engine from Ford. It is far more likely that the spring pressure on the
oil pressure relief is set too high or the relief valve is jammed in the
oil pump.
If the oil pressure relief is not at fault, the only other possible explanation (other than a stiff spring) is, as Bob has already suggested, a blockage in your internal oil galleys. Bob's point about wasted energy is spot on; however, it is usually indiscernible from a driver's perspective if it only makes a difference between 550 RWHP and 545 RWHP.
If you do have an oil galley blockage somewhere in the lubrication system, it will become apparent in short order. The engine parts that are being starved for lubrication frequently exit the block at high velocity, leaving an unmistakable exit path visible.
The issue about the ability to shear off a roll pin is real. Solid dowel pins are pretty robust and unlikely to break. Roll pins, on the other hand, are more fragile and susceptible to damage. If this is a concern, the easy fix is replacing the roll pin with a solid dowel pin. McMaster-Carr will be your friend.
It is worthwhile remembering that high-volume oil pumps will automatically operate at a higher pressure than their lower-volume kindred unless the additional volume is bled off the high-volume pump output through the oil pressure relief — and then you have a high-volume pump performing as if it were a low volume pump!
This begs the obvious question, 'Why did you bother to use a high-volume pump in the first place?'
My personal opinion is your oil pressure is probably just right for a high-volume pump or a lower-volume pump with a zesty pressure relief spring. Your oil pan may need some increased capacity, depending on how big it currently is.