72 340 Demon too far gone?

Thanks guys for the advice, it makes the most sense to build a car I want to drive.
For some reason I tend to feel an obligation to restore a numbers matching car. But in this case, the Demon would not be exactly what I wanted and probably is beyond my skill and budget to restore.
Redfish, your right, a rust free body would be ideal and I'll keep looking. The bright side is that I am getting plenty of practice welding