[pontiacvince]

In my '71 Suburban, I used stuff similar to Dynomat that I found on Amazon and put that sh&t EVERYWHERE! Ceiling, floor, sides. Did NOT put it on my wood rear floor. I used that reflective bubble wrap stuff mentioned earlier under the factory rubber mat. I used spray foam insulation in several of the perimeter gaps to insulate and sound deaden. I used regular house insulation behind the cargo panels. I insulated between my headliner panels and the roof. Also, I made some panels to cover the barn doors our of cardboard and the headliner material held on bt velcro. I have 50-series Flowmasters and I didn't want resonance or drone. Worked pretty well.