John, Clevitte are still very good. Northernautoparts.com or Summit Racing are a good place to look up whether they have them for the Datsun you are running. King Bearings are now becoming a big suppier for older model cars. I have had good experience with them. Both Clevitte and King make tri-metal bearings for some models, similar to the old Vanderville. On an IT Datsun, this may not be as critical with less compression than Prod/GT cars and oils getting better and better.