I'd agree with Webster, if you need to take more than a few thousands out of the bore to clean up the pits then just replace them. If the rust pits are isolated to the center of the bore and not in the outer bore where the cups ride then you should be ok. Don't try to get the pits out of the center or you will for sure be oversize and asking for a blown out cup one day during a hard stop.
Denny Graham
Sandwich, IL
Last edited by Denny Graham; 12/12/2010 1:57 PM.