Why would the cam bearing journals need to be casehardened? Crankshafts aren't, and they run in the same type of multi-layered bearings. Now, lobes are another matter- - - -some of them do get some type of surface-hardening. Iskenderian used to sell a "hard face" cam for sprint car racing purposes, but the installation instructions warned users to NEVER idle the engine- - - -keep it revved up above idle speed all the time. The automotive machine shop where I ran the connecting rod department for a while reground cams, and I don't remember them ever rehardening one after grinding the lobes.

I've got both large and small-journal cams stashed away, and I just might set up a tool post grinder on the lathe one of these days and see if I can make a late model cam fit an early block.
Jerry


"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!