We picked Az just because we wanted a "western - south western" state that had good scenery on the plate. Besides, we had just got back from our trip through Az in our '77 RC. Also, in our state, we can have any states plates that are year correct to the car if we have antique plates. That is the case with a few of our cars. Our Rambler has '64 wyoming plates on it. We like the desolate states with pretty plates, so we use those if possible.