Yup, Bitcherthane would work. it's sticky on one side. I might put that down after i repaint. You would think that would cut down the noise pretty good too.

 

I just ordered a new rubber mat for my 85 crewcab a few days ago auto custum carpets makes mats and carpets I bought it through RayBuck.com it was 139.00 plus 20 something shipping it was like half the price buying it though them I have not got it yet so I can't really tell you if it fits right yet my whole cab got a coating of fatmat sound deadener and the floor and back got a 1/2 inch foam on top of that it made it much better in side

 

here is some piture of mine http://s247.photobucket.com/albums/g...mouth/crewcab/

 

I put the bedliner on the floor of my 89 and then Blueskin for noise and juke and a rubber floormat. It's ok. The bedliner didn't help noise at all, but the blueskin was good and then the rest helped. I put all of that also behind the seat. I like the bedliner to keep the floor rustfree. There's probably better fixs.

 

I would really appreciate it if you let know how the Raybuck carpet fits. I'm curious about the foam, what kind was it? Was it the blue stuff that you can buy at Home Depot or Lowes? It would seem like alot of work but I think spending some time on the firewall and area behind the back seat would really help too.

 

I forgot to mention...the interior looks really nice. I have a similiar set of seats I bought on Ebay. When I get a few more details worked out on the interior I'm gonna tackle the seats.

 

We have had all our 1st gen ctd's @ work rhinolined inside the cabs and I have no complaints. we cut a hole in the floor on both sides with rubber plugs to wash out . Works good. I would think any of the previouse products suggested will suit your purpose well as long as you take your time. And from what I have seen and heard wear some old clothes with long sleeves when usuing herculiner. Or you will regret it.. Hope it all turns out good