.050"? Are you sure? I've never heard of a crank being turned .050" before?
I've never had to go more than .020" (extreme) usually .010", but I thought .030" was about the Most you'd want to go or just use another crank?
I've run Clevites and Mopar factory bearing with zero issues. Never tried the sealed power, but if everything is in spec. I don't see it being a problem. (unless there are any who can attest to SP bearing being Poo?)