Help working on 73 duster doors. How do you remove the inner crash bar??

By the time you get them out you will probably be scrapping those doors too. Not worth the effort to remove a little weight from the center of the car unless this thing is a hot, dedicated track car.

But like mentioned above..... Take the door skin off and be prepared for a bunch of body work on the doors after (and if) you get them back on.

Or, start cutting the inner side of the door off for access.