Hardtop Duster?

Here you go good read. And as some of you have had the trim off back there. It looks like Ma may have planned on doing a roll down rear window.
Lot of mounting places screw holes and empty room at top of frame not used and if you look at some of the angles could have been a thought that did not make it. But a lot more cost effective to just pop out a little window and less weight gas crunch time.
Here is the thread. Not mine.
http://www.forabodiesonly.com/mopar/showthread.php?t=284608