In Oregon you can get permanent (one time fee) antique plates only for 1956 and earlier vehicles.
but you can get permanent special interest plates i.e. classics, collectables, street rods ect if they are 25 years or older but restrictions apply to use such as parades, club events, car shows ect, more or less can't be used as a daily driver if you buy this plate.
these are one time only fees with no renew or periodic registrations. and only cost a additional 12 $ when you register here.
To me the only classic bronco's are the 1966-77 that we all adore so much.