What's it Worth? 70 Dart Swinger 318

Petty, the thing that sort of got me right off the bat, is he originally said he was just going to 'fix this one up to drive around in' while he restores a 72 Dart he has. The 72 is a parted out shell with no running gear, glass, interior, wiring, ANYTHING. I said if you're so set on a 72, why not just build this 70, and swap over the grill, bumper, gauge cluster, and marker lights?? He said nope, he wants a 72.. I don't get it, but hey, it's his car.