Ha! If u have a wife like mine she's probably wondering why the hell youre wasting time cleaning that thing up, but one day she'll realize your vision.
Good that no one cut the dash for a radio over the past 45 years!
There are folks on here way more knowledgable than me on sheet metal, but like doghows said show pics of the kick panels, and door posts, but don't cut anything until you have replacement panels on site to measure.
For that right rear wheel well you could weld/epoxy/rivet in a piece of thin angle along the crease to last you several years until a frame off.
Jeff