Yes your right on that , to do a good job you have to remove all the glass including the windshield, (except the 79 or 80 ) wagons have a huge trim peace in the back , trunk models remove the glass also , the bows that hold the head liner are rods that stick in holes on each side , make the hole you take it out of , there is sometimes extra ones for adjustments, a real pain to figure out , the last headliner kit I brought made for the pinto came from JC Whitney , fit well and costed about 80 bucks ten years ago , looks factory ,