Best of luck with your project. There must be something wrong with us Arizonans that we buy Darts from the East Coast;) I drove to NJ to pickup this one:
Mine didn't look as good as yours when I got to it. It needed all four floor pans, and new quarters.
While I was still stripping down that Dart I found an Arizona car which someone started work on. It was already media blasted and only needed one floor pan, so I bought it for $500 and put the first car in my backyard...
Here's what it looks like now:
Website for the buildup:
http://www.rhphoto.com/dart.html