you'll have to pull the wheel hub and rotor. if the wheel studs are pressed thru the rotor into the hub and there are two bolts holding the hub to the rotor, then it's the later style. the early sty;e used the 6 wheel lugs to screw the hub to the rotor. they're also shaped slightly differently along the outer edge. one is perfectly round and smooth, the other has some recesses cut into the od.
