Is there anything special to look out for when inspecting a 1970 Dart Swinger?

In FL, you do a non-op registration once, just to get the vehicle in your name.

Also in FL you have 10 days to complete a title transfer, or you pay a penalty.

Once it's in your name, you don't pay again until it's registered and insured as operational, and they send you stickers and/or plates.