Dart Headliner Installation Tech Help... Please!

No do not remove the windows.I have done 4 69 Darts in the past and yours is the same as mine.what i do is remove all trim,and mirrow.take a sharp knife and cut the old liner out leave the bows in place once the liner is out remove the bowes do not mix them up start from the rear and number them.You will see under the winsheilds rubber gasket there is sharp pins that the liner hooks to.When your ready to install slide the bows in the liner i like to install the middle one first then start the rear one next they just pop right into there channell.Hook your liner at the rear leave some liner as to trim laiter then start pulling as you install the bowes forward this is now streatching once you got all the bowes in and tight pull the front liner in the middle and hook it under the rubber gasket you will see thoes pins under the gasket then start pulling the liner at the front moveing from left of center and to the right of center and hook it ,once you have it tight you can start on the sides you will want to glue this area contack cement is what i use.It sounds easy when you have done 10 cars.There are step by step instructions on the net as well.Good luck.Tip after you done and ther could be some wrinkels in her just mist it with water to help in shrinkege.