Well, I learned something new about A body Mopars while doing some Googling. It seems that Dusters and Dart / Demons have always had different shaped front wheel openings.
Duster
Dart
Looks like the kit has modified Duster openings that were opened just a little too much.
You can see the exposed chassis area that I had mentioned in an earlier post. It's hard to tell in the crappy pic but the raised lip around the opening doesn't follow all the way to the bottom rear. It's like someone just cut the piece out with a knife. Also the front wheel isn't centered in the opening.