Mustang Distinctive Industries Package Tray (1968) Installation Instructions
4. Prepare your car for the new Mustang package tray
by removing the original package tray material and fully cleaning the surface.
5. Lay the insulation in place. Mustang spray adhesive
would be good to use to secure it, but that isn't required.
7. The Mustang package tray
is held in place by rubber stripping on the bottom edge of the rear window. I used a paint can opener to help pull the rubber edge up to wedge the package tray in.