The cam bearings in 460's are very narrow. Once the spring pressure and cam aggressiveness gets too high, the bearings fail to hold up. The ultimate cure is a roller bearing conversion, but there is also a stop-gap fix out there...
There is a wider bearing out there. 351C bearings are wider, but you can't use the entire set. I don't remember the specifics, but if you look up the OD's and ID's of both the 351C and 460, I believe you'll find what you are looking for. (maybe use one bearing out of each set)
At one time, I believe a guy on
460 Ford Forum - Powered by vBulletin was selling these matched up sets. Anyway, it is possible to use a wider bearing on these 460's.
Good Luck!
