Classic/Antique Car Repair: Brake Rotor/Wheel bearings, wheel bearings, brake rotor

Question
I have a '68 cougar that threw a front brake pad and it chewed up the rotor.  I bought a new rotor (Wagner)from my local parts store along with new wheel bearings.  The new rotor has the bearing races already installed.  Should I use them and install the new bearings, or should I punch them out and install the races that came with the new bearings?  

Answer
As long as both sets of races are brand new, and assuming they are identical, you should be able to use either set.

If the new set included races that were packaged separately from the bearings, I suppose it's safe to assume that the precision of manufacture is so improved that they don't need to worry about matched sets anymore.  

If the new set of bearings came with races in the same box with the bearings, then I'd change my mind about this.  If you have the time, tools and patience, I think it would be safer to use the races that came with the new bearings, as they presumably were ground together, as a set.  This is assuming the new bearings came already matched to the races.   

I'm really surprised the new rotor came with races installed and no bearings with them - that is an odd way to sell bearings!

Dick