Personal opinion but I think you have 5K of sheet metal repair, 5k of paint/bodywork (being very generous for a driver quality) 2k of interior, etc. And it's still not a high performance car. Just remember it costs the same to repair the body whether it's a hemi or slant six!
Indeed. + It's only original once.
However, I would get rid of some of those dents. The left rear quarter can be pushed out from the inside. Remove the interior panel, wind the window up, and push through there. Won't be pretty, but it'll be better than what it is now.
Same goes for the small dent on the drivers door.
Outside of that, keep it mechanically sound and drive the crap out of it.