[OG68]

You’ll need to make relief cuts around the rear window corners, quarter window curve as well as behind the ear muffs.
Place the ear muff against the headliner and tape off the upper edge of the ear muff. This will give you an idea how far you can cut without messing it up. You’ll still
May have few wrinkles left but I was able to pull them out from the upper rear window area.
If you have a small space heater place that on the package shelf to heat up the interior. Makes it easier to stretch the fabric