Rod Bearings-NOS Copper/Lead vs Clevite 77

[svm99]

I have an opportunity to purchase some .030" NOS 8BA type Ford rod bearings for use with a Merc crank which will cleanup at .030" under on the rods. These are very good condition original insert copper/ lead bearings with a steel back. My question is, how does this bearing compare to a Clevite 77/comparable insert bearing. The engine will be a 3 5/16" bore built for street use. I'll look forward others thoughts on this. I acquired .020" Federal Mogul inserts for the mains.
Paul J.