I think you have a pretty good understanding of the basics. I would recommend you look at the area behind the seats, on the 'shelf' for rust through. The car looks to have certainly been repainted, so take a good look at the inside of the trunk, side panels and rear panels for color and correctness. Some previous damage is almost inevitable after almost 50 years, but if it has been repaired properly it shouldn't be a problem. Check the wiring for the obvious DIY fixes that could cause some problems down the road. Good luck with you search, this one looks pretty good.