I’m restoring an ‘81 BJ42 to be my daily driver and road tripping truck. When I put it back together, I’d like to do some things to reduce road noise a little. I plan on having the entire underside covered in a smooth bed liner material to protect it from rust. I have heard of people putting fibers in the underside coating to absorbe road noise. What’s the best materials for that? I am keeping the full sized doors. Is there anything I can put inside the door or something I can do to the door trim panel to make it absorb noise. I’m planning on putting removable carpets on the floor inside and I’m going to use the SOR thick headliner all with the intent of reducing as much road noise as possible. Is there anything else that can be done?