Valiant and Dart fenders

If you look at Dart fenders, the trailing edge of the wheel openings angles back...you'd have to change the entire front clip, and I don't think the hood would match either.
If you look at a Demon or Dart Sport, the trailing edges of the front and rear wheelwells aren't the same. The Duster sold so well Dodge demanded their own version, it was whipped up pretty quickly.
I think the same oddity is true on a Plymouth Scamp, basically a Dart with a Valiant clip.
Hope this helps,
Alan