This is just thinking out loud so don't get freaked out about it until some ford guy answers but,, was there some deal with certain FE engines where you needed to 360 deg mains to feed the rods because of the location of the oil hole?????
I really do not know why i am thinking that but it just popped into my head... Like i said don't get freaked out because i could, and probably am totally wrong. I might be getting it confused with another engine family...
If that is a none issue i would use the bearings that only had the top groove... 360 degree mains are not needed IMO...