Installing 72 Demon door panels in 74 Duster?

Nope, they wont work. You will need panels from a 73-76. Or you would have to put 70-72 Duster or 71-72 Demon doors on your car to use the panels you got. Not only are the door handles in a different location, the 73-76 doors have the plastic trim on the top. The 70-72 doors are metal (painted) on the top, and its part of the door.