70 and 71 Duster Demon is only what will fit. 70 is different then 71 and will not interchange. 70 has a clip on each side to hold the bows. 71 is bent as the bows pictures above and there is three different holes for each bow per side.. Don't forget the clips on the rear bow. It holds them so you can stretch the liner forward off the rear bow for placement of the other 5,
So you can only use the sport style roof bows and you have to know what year your car takes. Once you determine that I should be able to help you.. A picture of your roof support will help. Just because your car has a specific year on the title doesn't mean it came with that style bow. I have seen them with either on late and early cars