Wayne, I would have expected the rotors to have slightly oversize holes for clearance to the studs. That would be why they are bolted to the hub where the drum attached.
Like this Thinking a little more. Are the studs pressed into the rotors? If so, then what keeps the hub centered? Seems it would have oversize holes also.
I have looked into this before and needing? to have the rotor drilled and tapped for mounting bolts, makes it about a wash to buy the kit, especially if one does not have cores for the calipers.
