Valiant pans are different in the rear portion. Darts or Scamps are based on a Dart body and has the footwells for the longer wheel base.
I have never parted out a 67 up Valiant, but I suspect a 67-72 or 73 Valiant pan would be the same. 74-76 Valiant 4 door sedans and
Valiant and Scamp ht's. are based on a Dart platform.