I would think the toughest thing to find for that car is the original seat material. The car seems fairly straight. Hope the floors are good. And frame. Not the end of the world if not because those can be found/fixed, but that's going to be a ton of work no matter what. And it's 1 of 346? How much will it be worth when you pump 25K into it fixing it back up to its former glory? 25K? Maybe even not that much.
You have to want to save it because it means something more than just a cool old car that needs saving.