Headliner Installation '72 Duster
My 72 was cardboard lol.. If yours has the bows, I know there are possibly two variations (based on #s of bows). Yes, Headliner before salipanels. As far as rollbar, not sure, but I think I would put headliner in first. All glass out.
Since its a 72, you could use the repro one people have mentioned here recently thats plastic and be correct. Material is bitchy because it rips easily, and the wrinkles are there.. if you can leave it opened, and steam it, and leave it some more, it can be done... but you need patience (and with the 35 minutes you gave before the BUMPER, that may not be your strong suit lol..)
Grant