There are a lot of quarter window variants per the parts book. These are "Quarter Window, Complete" for the Challenger.
3505738/9 - 1970 Hardtop/Fastback Clear
3505740/1 - 1970 Hardtop/Fastback Tinted
3505734/5 - 1970 Convertible Clear
3505736-7 - 1970 Convertible Tinted
3500280/1 - 1971 Hardtop Clear
3500282/3 - 1971 Hardtop Tinted
3500276/7 - 1971 Convertible Clear
3500278/9 - 1971 Convertible Tinted
The book states that Barracuda convertibles use the same windows as Challenger convertibles of the same year.
Weatherstrip part numbers are also different but don't break on the model year boundary.
2963232/3 - 1970 Barracuda/Challenger hardtop/fastback/convertible to July 1, 1970
3500286/7 - 1970 Barracuda/Challenger hardtop/fastback/convertible after July 1, 1970, and all 1971 hardtop/convertible