Stock? Hi Pressure? Hi Volume?

If you are keeping the bottom end clearances close to stock, just run a stock pump. Even that can pump 4 qts into the valve covers faster than it can drain back! Stock small blocks were never known for under oiling under anything less than really brutal use. If you run a high volume with a stock pressure spring, you are bypassing almost all the time. If your pressure exceeds the bypass pressure then you are delivering not only more oil than engine can use, but more than the bypass can dump back into the pan! Oil filters will either internally bypass (and not filter) or leak. And it takes an obscene amount of power to pump oil at that presssure! Whats the point in buying an "accurate" timing set if your cam is going to see up to 10 degrees of twist due to massive oil pump load. Yeah, that twist is at the distributor end! More crankshafts have been trashed due to oil pump drive shaft failure than starvation.

Go out and (have a friend) watch your oil presure gauge as you make a max effort acceleration to top speed. You want 10 PSI per 1000 RPM. Asl long as you dont see a high RPM drop, you are fine.

Also consider oil control. If you have that big pump slinging oil everywhere, how much makes it past the rings? It sure dont take much oil to cause massive detonation. I'd buy a scraper and tray and stick with a stock pump on the street.