In the UK the car might be classified as a write-off for insurance purposes. Depending on the catagory of write off it maybe illegal to rebuild it and thus can only be broken for spares.
If you rebuilt it the official paperwork would state that, thus any prospective buyer would know.....
Agree with the Dr it's a lot of work. Even re shelling a car takes time, even when you have a fresh shell to transfer all the parts to.
Malc
Scotland