You can get the roofing/duct 'peel and stick' at a home depot for fairly cheap and that'll go inside the doors for sound deadening and insulation. The peel and stick stuff is the same as dynamat but cheaper to buy in rolls from the hardware store.

In the rest of the cab, including the roof, I put down peel and stick first and then glued jute or the aluminum bubble stuff on top of the peel and stick with 3M spray adhesive. It is amazing how quiet and solid it makes it, and makes a huge difference keeping the heat/cold in/out.

'51 Chevy 1/2 ton w/'62 261, HEI, offy, fentons, dual carter/webbers, t-5 & 12 bolt posi