If you can turn that thing around and get it road worthy, show worthy, my hats and a few cases of beer off to you...I salute you!!
One of the comments I still remember from talking to a body guy decades ago was that its always best to start with the best possible frame/unibody, shell you can, and then build around that. You will save yourselv a lot of time and money in the long run.
My beloved Buffy with the nice original floorboards, etc. is looking more and more sweet...