As they say...everything is repairable. The question would be "at what cost/time"?
The right rear suspension console and engine mount console are in very, very bad shape indicating the right longitudinal requires replacement. (I would also suspect the right side inner/outer firewalls would be in similar shape.)
The good news...replacement panels are available.
Restoration Design is right in your backyard...you might want to talk to them about your plans before you jump in with both feet.
http://www.restoration-design.com/store/CTUSMy concern would be that the starting point of this project would require a body frame/jig to ensure correct geometry (during &) after repairs are completed...with the visible "sag" it would be hard to get a good reference with jackstands to start this repair.
My $0.02
Good luck!