I'm finally finished with what I can do to improve the metal on this car.
I stripped the driver's wing down and did some hammer/dolly work, pulled some dents, and cut out that big smash and replaced with a patch. It's decent, but not awesome. I feel like I could have done better. But it is solid and will look good when filled - with 1/8" or less, of course. Most places are 1/16". You can see that this car got hit, hard - hard enough to dent the inner fender well.
Then, since I couldn't stand it, I made a patch for and replaced the passenger's sill like I did the driver's side. I am glad I did - there was junk in there and the metal wasn't super great either.