If they are original Ford wheels, then yes, you will have hub register sizing issues. You can either mill the hub on the rotor and need to do this for any future rotor changes, or mill the wheel so it fits any mopar in the future. FWIW, the wheels on my Challenger to the left are 15x8s off an Explorer I found in the salvage yard. However, since they fit right on and are pretty wide, I think they were aftermarket wheels. But hey, how can you argue with $60 for a complete set.