I thought they were Mustang rotors and hubs because they were in a box that was for a '93 Mustang I had replaced rotors on several years ago (I never throw anything away).  I rechecked the numbers on the box with the parts house.  That's what I get for assuming.  I have not been able to identify them as yet.  They are 5 on 5 1/4. Not Ford, not Chevy not Chrysler.  All I have to id them is the casting nubber which is BR 54 560.  I haven't found a parts place that can id them from the casting number, so I guess this is a dead end. 
Brad