They'll prolly sound a lil better than the basic stock speakers. But if you do just put in the speakers, you'll want to test the impedance on them. I believe that they are 2ohm. If thats the case you will need to tie in a resister to bring them up to 4 ohm.

And for the DIC....here is a write up on how to do it.
http://www.grandprixforums.net/dic-c...kes-34472.html