Supervise your interior shop!!!! Not all understand how to do an older style headliner. So many these days are shell types with glued in material.
I had my 70 done last month. The job was OK, but not perfect. I had some words with the installer and he admitted that he hadn't been very experienced in this type of installation.
The sail panels (muffs) in the rear have to be done properly or they will bend in the wrong direction and a gap between the headline and the panel will occur. Also, don't let them spray 3M adhesive on the panel and then press the material on. The glue will pop thru the material holes and look like hell. I had them recover the panels after we sprayed the mistake black. Only spreay on the back side and fold over the material to secure.
also, your new material will have creases in it. Unfold it and lay it out flat for a few days otherwise the material crease will show for a long time.
Finally. Make sure the installer doesnt loose screws, understands how to properly reinstall all the plastic around the rear window, above the door, over the windshield and check that he didn't stretch it too tight and elongate the material air holes.
All these things I had to have the installer redo to some degree or another.
------------------
members.tripod.com/dfdolerjr