2 Questions

I have done the tailpanel replacement and it's really pretty straightforward. I would start with the tailpanel you have purchased so you can get the hang of it. Where the tailpanel is welded to the rear quarters it has been leaded in. To remove the lead, use a small propane torch and a wire brush. Heat the lead and simply scrap it off using the wire brush. After you have done this, the welds will be visible and you can drill them out. To replace the panel, line it up with the body lines and weld it back together. There will be no butt welds.
The hardest part of this will be salvaging the lower corner pieces. These are (or were) not being repoped. I had to fabricate one. I can post some pics later tonight, or email them to you if you prefer.
C