70 340 getting built ..one problem

This isn't true. Oil leakage is controlled by the bearing clearance.

Side clearance is almost inconsequential.

I agree with this but would add that side clearance IS inconsequential. I have a G3 Hemi I built with more than .200" rod side clearance and the oil pressure was WAY too high until I removed the 6.1 pump and put in and old used regular 5.7 oil pump. Voila! 60-65 psi at full song and not over 110psi!. J.Rob

p.s. I've also built many 470 strokers with Chevy RJ's and Chevy BBC rods with way too much side clearance--guess what? NADA ZILCH ZERO diff in normal oil pressure trends