46Dan, go to the search button above and put in "sound deadeners" -- there's some great info about it all that's been discussed in the past. Basically, the Peel 'n Seal roofing material available at the big box home improvement stores works great... on your floors, strips in your doors, etc. After you lay that down go to a carpet store and buy jute padding. Use a 3M 77 adhesive. End result is a much quieter ride.
One tip: Leave yourself access to things like brake fluid resevoirs, batteries and transmission floor plates that are part of the floor. I recently had to replace my clutch and had to remove the tranny floor plan - which was under all of my sound dedening work - #@%!
One other thing: Before you carpet, lay down extra wires to the rear of your cab for the future... like speakers, etc.
Good luck!
