if handling is no concern at all, just get new stock caprice (non-9C1) shocks and springs and make sure all your suspension bushings are in good shape. the ride on the civi caprices was aimed at the 55 and older crowd; the suspension had to be as gentle as possible so as to keep the seats clean......(jk). if you need new tires, be sure to get touring tires, not performance. tirerack.com has ratings for ride and noise quality -- just get the best tire in that dept and you should be set. just be careful not to fall asleep behind the wheel.
it all depends on how much you want to invest..........
my first advice would be to buy a bunch of sound insulation (you can buy it anywhere from JC whitney to car audio shops). pad the hell out of the trunk, then the doors and under the carpet. i think there is a similar insulator available in a spray-foam, but you'd need to ask someone else about that. you might have better luck posting in the audio and interior sections for info on insulation. i doubt weatherstripping would help unless your current stuff is rotting. and finally my disclaimer -- i am moving my car in the opposite direction. my suggestions on the insulation come from actually REMOVING this insulation in an effort to reduce weight and noticing the increase in sound from doing so -- others will be of more assistance. hope this helps.
Not the sure if I'm along when I say this, but the '91-'96 b-bodies are not great in fit and finish of the doors. The seals do the bare minimum. If you take a look at an older caprice, the design is better in closing the gaps. I too am experiencing a lot of noise in the cabin, mainly because my doors are somewhat out of alignment.
Have you checked the doors for correct alignment and all the seals?
<BLOCKQUOTE>quote:</font><HR>If handling is no concern at all ...<HR></BLOCKQUOTE> then do what MobyDick says, and also, seriously consider removing your swaybars, or at least your rear, if you have two. Removing a front one, and leaving the rear one on, is fun though, if you dig that sorta thing ...
I know about the door problem, i owned a 92 for a little while, and the doors were perfectely strait with the roof of the car. 93 and up i noitices there is a 1/4 to 1/2 inch gab from the top of the doors to the top of the roof. mabye when i put the 92 doors on it will sit better. or mabye i should chop the roof 1/4 of an inch off... eather way. ill look into it