Well, it wouldn't necessarily line up with the raised section of the hood on the later Dusters, but there's no reason you couldn't put one on there. Since the Demon hood is actually longer than a Duster hood, you'd just have to trim the vinyl at the back edge of the hood. It would actually give you a little leeway with how you mounted it, you could move the vinyl forward a bit to make the blackout part at the front of the hood wider if you wanted, you could actually adjust it a little to match better with the Duster hood. It would only be a few inches forward or backward, but it would make a difference.
This shot gives you a little bit of an idea how much longer the Demon/Dart hood is compared to the Duster hood. This is shot of the Demon hood mounted on my Duster as part of it's conversion, while it was still wearing the Duster fenders. The additional overhang shows how much longer the Demon/Dart hood is, it goes all the way out past the front of the bumper on a Duster.