I have the original 2 piece brake rotors on my 70 Cuda and nobody makes the 3" wheel studs for them. Will the later unicast rotors swap onto my car without changing the spindles or calipers, or do I have to change other stuff to make them work. I have access to a 73 Duster with disc brakes, but I don't want to change the spindles or calipers if I don't have to.