Welcome and thanks for saving the car!
Lots of good attributes to the '65-'68 Chrysler C-bodies. Each generation of body platforms has their own strong points, though, other than they are CHRYSLERS. Might be some patch panels for the rusted areas, but some talented fabrication operatives might make some, too. As good as the factory vinyl roof cars looked when new, age is not very kind to them, many times. But all of that can be dealt with without too many problems.
You look to have the makings of a pretty nice car, when done, or even when a "25 footer".
Enjoy!
CBODY67