Demon door?? Which others fit?

Interesting that they are the same shell. I checked my 70 and 71 Dart doors and both have the two rectangular indents on the bottom where the Duster and Demon window tracks attach.

I don't have 67-69 Dart doors to check, but do they have these rectangular indents as well? I know the radical window design used on the Duster was years in the making, so would be interesting to know when they put those recessed versions into main production. I doubt they would have put them there for any other reason.

Grant