1971 Florida era license plate

I used a 1973 8W-xxxxx plate (Volusia 3500 lb car) for the Scamp no problems. Sent it, the application and 60 bucks to Tallahassee. Had it back in like a week. With the registration and sticker. And they sent me back a check for $20 for some reason. Yes, it has to be the year of your car, at least 40 years old (I think).