Found my dads original 1971 duster!

I believe that the Door felts or cat whiskers are the same for darts or dusters. The difference is between model years. The earlier say 70, 71 are held on with clips on the whiskers themselves as for the later say 72, 73, 74 are held on by difference method which I can't recall. I ran into this issue with 69 style vs 70 something on a dart door skin. The "builder" probably used the later doors as I believe the outer shell (skins) are the same. Hopefully someone else can confirm for you.