.0015 on Rods Too Tight 408?

This is with plastiguage and it is honestly a flyshit bigger than .0015. I thought I would run a thinner Full syn oil and that would help. This already has the X bearings for extra clearance. Krazycuda you are right on the standard specs. My "How to modify your Mopar Magnum V8" and "How to build big inch Mopar Smallblock" books states rod bearing tolerance as between .0005 -.0022. The lower number being very tight and puts my .0015 just about in the middle.

My brother ran close to .003 on his 451 and he now has low oil pressure on idle. He said if he did it again he would run tighter tolerances. I am leaning towards leaving it as is.