Insulating cab

I recently put a new headliner in my 1965 Dart. I used the aluminum foil-bubble plastic sheet at Home Depot, using several glues - Gorilla Glue (polyurethane which foams a bit), ER7000, and drops of superglue to hold it while the others cure and holding it up with the bows. I used one layer of sections cut between the cross-members and one overall layer, stuffing it into the gaps at the front, back, and side frames. I did similar on my 1965 Newport ~1992 and haven't noticed degradation, though haven't been "in there". I used drops of Gorilla Glue at the teeth which grab the headliner at all edges as belt & suspenders, holding it with binder clips until it hardened. The rear window and gasket was out at the time (removed for painting) but the front windshield was in and was able to work the headliner past the gasket.

BTW, I found that, unlike the front, the rear window must come out and go in with the gasket attached. Found the hard way by trying to pry it out of the gasket and shattered it (lucked into a used replacement locally). You work the inside rubber lip over the body pinch weld. I used the rope trick when re-installing and first bedded the glass in the rubber gasket with proper elastomeric caulk (butyl rubber? forget) to avoid leaks. I used a roll of round sealant (Amazon) on the outside between rubber an inner stainless trim before clipping in the outer stainless trim (careful pushing into clips to not dent it, one oops).

The sail panels were degraded, so I had tossed most remnants of that hardboard stuff. I cut new ones from ABS sheet, using internet photos as guide. I glued thin polyfoam to both sides, stuff that comes in electronics packaging. Otherwise, they would rattle on the metal sides and might see the screw heads thru the headliner (glued over). I used a door clip in round holes where they fit, screw into a plastic license holder where they fit in a square hole, and drilled a few small holes at the rear for stainless screws.