I was thinking of using the spray on foam on the roof, but after seeing what that did to the Dodge Bighorn cabs as far as rust I changed my mind. I made my door panels and rear window surround by using 1/4" foam signboard backing, to glue the vinyl material to. I just did the kick panels using 1/4" luan as backing in case they actually got kicked. This past weekend I removed the torn pieces of cardboard from the firewall, and used Eastwood's brand of Dynamat I used 4 of the 5 sheets that I bought for that project. To hide the silver face, I painted it with a rubberized undercoating. For the roof, I'm going to spray the inner roof with some type of sound deadener, and then make my own panels using the luan again for the main pieces, and the quarter inch foam backing for the over the door panels. It isn't perfect, but it's much better than it was, and every piece that I add lowers the decibel level inside. It's getting quiet enough that my wife may ride in it! I'll try o post some pics of my progress so far. Mike