Slow, Driving Rustoration 1972 Dart

Imo I think you should do what you can as you can. Take it one step at a time. It's so easy to completely disassemble a car and get overwhelmed or sidetracked or delayed or whatever and as time goes you loose parts, parts get damaged in storage etc. Ask me how I know. Keep it together drivable. If you want to do a project do only what your working on at that time.
Oh I know too! That's how I lost my 70 Dart 30 Years ago. Took it all apart, had a knee injury, went back to school, lost my storage location and ended up selling it. I'm mostly worried about doing a good enough job to combat the inevitable creep of rust.