I tend to agree with NealM. Unless you have large bearing clearances in a 'low friction' race engine there is no need for a high volume or high pressure pump. You are just putting a lot of unneccessary load on the
oil pump drive shaft and cam gear on the distirbutor. If you search here you will find more than one thread describing
oil pump driveshaft or distributor gear failures that were probably compounded by the
oil pump selection. I'd be happy with 60 PSI max pressure. I have a stock pump in mine and it idles at about 35 PSI hot and maxes out at about 65PSI hot at high RPM's.