Is a scout kind of like a Jeep?
I have a friend who gutted his 93 Jeep wrangler interior. He used bedliner and coated the dash, floor ceiling, everything. It's held up real well to ALOT of abuse.
Even with a loud exhaust (cat. convertor only and then a straight-pipe the rest of the way back) it's not too bad. I guess it would depend on what tires you have too. It seems like big meats/ lift kits generate more road/wind noise.
Besides...cranking it up with some Metallica while you're doing this...
http://www.fotothing.com/photos/a27/a271e61cd1104ae39b18b010f3656b54.jpg...is good fun!
headbang.gifIf you have big rusted open holes now, fixing that will help with alot of your noise. Do the bedliner, you'll like it. If it's too loud for you, just put the old interior back in. Just make sure you stick the bolts in any screw holes before you liner them over.