How much rust is too much?

One more thought here... In the early '90s I had and drove a '72 Charger that only had around 35k miles on it. All the parts on it were beautiful. But the rust from sitting was probably about what yours is, maybe worse. Interior, trim, motor, everything was absolutely beautiful. I wish to heck I'd had the space to keep that car, because if I had it today, I would find a solid shell and swap everything over and end up with a beautiful Charger. You, RIGHT NOW, are in that same position. Not a bad position to be in, you're lucky you have the opportunity to take advantage of it.