Oh I would never be one to tell someone how to build their car, you do you! I just remember looking for old VW parts and clean dashes were always the hardest to find. I'm imagining the same would be true for the Dart so I'm going to try to keep it as hole free as I can.
I love that dash piece, that's exactly how I saw some others mount their extra gauges in their cars. It looks like it might work well, maybe I'd be able to fab something up too. Something to add to my never ending list haha.