They use the same inner fenders, frame, and etcetera. The latch support, latch support bracket and all front sheet metal are needed from the Dart. Not sure on the hood line, probably the same at the back. You may have to mod the fenders to fit the Barracuda doors, but I do not see any reason it won't work. Dog Fish? Not sure I would care for the way it would look but it would definately be unique. The Barracuda has curves, the Dart is square. Sounds like a clash.
