I need to lower the oil pressure in my 340.
It runs at 90 psi cold and 60 hot(2000 rpm). I changed to 10-30 oil to get these numbers, it
was higher before.

The engine was built for the strip and I just
dont need this much pressure. I get an occasional
6000 run, but not much above that often, and not
for extended time.

Would I be better off replacing the pump or trying to lighten the relief spring?