Wow! What a car!
If mine had started out looking as good as yours I probably wouldn't have done a thing to it. But, it is fun to "tinker" with it and replace a little here and a little there to try to make it more authentic if you're into that. Maybe get the radio working if it isn't. Stuff like that. But, certainly nothing major as far as I can see.
I agree with others that safety is worth some modification, i.e. a starboard tail light and maybe super bright bulbs to go in them to be well seen from behind. Here's a new one ready to install for $28.00:
https://www.youtube.com/watch?feature...&v=JvX6hoUzgBE And here's the super bright bulb to put in them:
http://www.vintageford.com/part_sear...3-6sb&Category=