Personally I think it looks decent as a project car. Yes, the floors and floor supports need replacement. I don’t see any evidence the sills need replacement though- just surface rust on the bottom edges. Interior condition - yeah, the seats are f##ked, but things like the tunnel vinyl, centre console, etc., look decent enough. The bonnet has filler in it though - the centre swage line gets indistinct forward of the hump. Probably had a little bump.
Fuel tank - some homie decided using the drain plug to run a line to the electric fuel pump was a good idea...
For a mid-four figure car, I’d have it. Perfectly workable to get something decent out of it.