Plastic/Cardboard headliner

Guess that we will never know. I believe that I am the 3rd or 4th owner of my '72 Dart, if it came with a cardboard headliner, someone found a used 340 Brite blue ( not painted ) ABS headliner and installed it. The rest of my interior is original. I replaced the orginal furry carpet with pile. Will be replacing the orginal cloth/vinyl seat covers and door panels with legendary parts when they show up. This car was a poster child of original till the previous owner gave it a paint job and changed the suspension. I have overhauled and is still stock 318 and 904 trans.
Was just adding my 2 cents, kinda got off track for the OP.
Merry Christmas and Happy New Year!
Ummm, sure we will. The ABS headliner is a replacement for the OEM hard board headliner used in 73+ A bodies. I helped test fit these back when they came out around 15 years ago. If yours is truly ABS it is not original.
To the OP, I would suggest getting a fabric headliner and giving it a try. If you already have all the bows that is the route I would go. They look so much better and are not that hard to install.
I have salvaged a hard board headliner by putting a layer of fiberglass on the backside for strength and then covering the front with vinyl. If you have one that is cracked up this is a good option. If its all warped up like they sometimes tend to do, not much to do to save those.