I registered my 69 FB in the White Mountains, just got done doing the renewal for the plate, $66 for 5 yrs, originally $75 for 5yrs. No emission test required as long as you're not in Phoenix or Tucson, then every vehicle (truck, car, bike) must be smogged. I've never had any inspection on the Mustang, or my dirtbike which I can now ride legally on the street. Off road vehicles require either off road tag or registration. After 5 yrs (I think) registration length increases depending on where you live. Phoenix was for 2yrs on my truck, now it's 5 yrs in the boonies and no smog, same for all my bikes, except '18 Honda GW.