I made my own abs plastic head liner and I didn't glue it at all. Mine is secured by the rear and front trim pieces. The sides are secured by the weather stripping. We glued a piece of suede over the abs plastic, but not to the inside roof. Here are some photos.

http://s159.photobucket.com/albums/t160/sworden73/

https://sites.google.com/site/bluejaygarage/home
53 half ton http://s159.photobucket.com/user/sworden73/library/?sort=3&start=all&page=1
72 Nova SS sold
75 Corvette
52 Chevy Styleline Coupe