Clois, I agree with dscott, the FE when coupled with a HV pump will drain the pan and flood the valve covers with
oil.
Make sure you have ample
oil in the pan, check and possibly the drainback holes in the heads.
The amount of
oil fed to the rocker shafts can also be reduced by placing a std holley jet (about .080) in the oil feed hole. That will give you more oil where you need it and less where you donīt.
I had my Shelby on the Autobahn going at a decent rate of speed, when suddenly a huge plume (I mean huge!) of blue smoke came out of the exhausts... The cause was a flooded valvecover and my PCV sucking in all the oil - got me pretty scared but no harm done. Easily fixed with the holley jet trick.
Regarding the bearing size I see no difference to the 427 and those were used in NASCAR and won LeMans. Surely running at higher revs and longer that what you & I will ever do.
Keep the revs below 6500 then it should live a long and happy life.
What did you set your rev limit at?