full groove main bearings oil pressure ?

I run full groove mains in my 440, all clearances at factory specs.
use 15/40 mobile 1 with hy volume pump the pressure is off the scale cold and 65 psi at hot idle with 8 quart capacity.
I run standard mains in my 383, all clearances factory spec, stock pump with high pressure spring 20/50 vr1 provides 80 psi cold 50 psi hot at idle