RE: What to do with a 72
I did not see the movie, but true enough there are a lot of Dukes fans out there and they love all of the Dukes' shows. My six year-old likes the Dukes and we watch it together. That would indicate that say in ten or twenty years there will still be Dukes fans. Hey, it's good, clean family fun, so why not let kids watch it. Tomorrow they will be adults and we will be seniors and eventually dead.
Regarding your car...I would forget about putting it back to its stock configuration. It has no great value that way. Definitely keep it in its movie form. You will have to decide if the body was bondo'd to death and has a weak shell. If it needs help, then restore it exactly the way it was in the movie, right down to the stickers and their exact locations. Don't change the color or interior. Put a nice, healthy motor and trans in it and start taking it to shows. Write to the studio and see if you can get any stills of the car from the film or during filming.
Good luck and Mopar to ya!