The general consensus on BB and SB Mopars is 10 lbs of oil pressure for each 1000 RPM, so a motor shifted at 7000 RPM needs to have 70 lbs of pressure at 7000 RPM No matter what weight oil or the oil temps. I got away with 65 lbs of oil pressure shifting at 7000 to 7500 RPm with 5W20 WT oil at 160+ F oil temps in my old pump gas 518 low deck stroker motor with BB Chevy rod journals with .003+ bearing clearnces on the rod bearings and .0035+ on the mains It had from .054 to .035 rod side clearances using a set of 6.800 long BB Chevy type H beam stel rods also, it went against the grain on a lot of the old myths posted on here
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
No matter what weight oil or the oil temps. 
I got away with 65 lbs of oil pressure shifting at 7000 to 7500 RPm with 5W20 WT oil at 160+ F oil temps in my old pump gas 518 low deck stroker motor with BB Chevy rod journals with .003+ bearing clearnces on the rod bearings and .0035+ on the mains 
It had from .054 to .035 rod side clearances using a set of 6.800 long BB Chevy type H beam stel rods also, it went against the grain on a lot of the old myths posted on here 
