72'Duster will be a feather compared to the Dart.
There is an art to gutting doors and still keeping the regulators and their respective windows working like stock.
Nothing more of cost other than some fine cutting wheels for the grinder and Dremel tool. Oh, and cut holes in the regulator arms as well,including the rooster wheel that activates every thing.
Every ounce counts.
The trick is really in applying the cutting wheels to every thing possible from the door C pillar jams forward to the front bumper.