A high volume pump should only be used if you have external oiling components: remote filter, cooler, Accusump, etc.
If none of those items are in the mix, then you have a restriction somewhere. Is there good
oil flow to every valve stem?
Too much
oil pressure is not a good thing. The
oil pump is run off the bottom of the distributor, which is run by the gear on the camshaft. It requires a lot of effort to make 100psi. That's wasted energy, and too much strain on the drive mechanism. You have a good chance of shearing the distributor gear roll pin, and wearing out the gear.