On my 1955 1st Series 1/2 ton Panel. I used Black Butyl Noise Control Acoustic Mat and then covered it with Heat Shield Insulation , Deadener Aluminum fiber. Sticks well and easy to work with. I covered the inside roof and walls I ordered the ABS pre cut from QuietRide Solutions
The one question I want to ask is do you have the headliner bows? On my panel they didn't have them .But there were several drilled holes it might have had them on my panel .I`ve been looking for them and I might go with Metal Fabrication shop. Just to see how they looked and the Length.
