70-76 A Body gas tank filler tube

What body style did it come out of? If I remember right, a filler tube for a Duster, Demon and Dart Sport are different than a Dart, Scamp or Valiant.
I’ve had this for over 20 years and having a hard time remembering. Is there a way to help. I had a Dart Swinger and a Dart Sport.
Is there a way to know for sure?