Thanks everyone, and here's a link of the muffler I'm getting on a corolla (I think it sounds a little fart canny, but on the 3400 I'd expect it to sound even deeper than it does there):
http://www.youtube.com/watch?v=Cwzt4MsP0fI
Also, what's everyone's opinion of either dropping the car and/or getting bigger rims to fill up the wells?
Edit: Here's a better video/sound, this one's on a beamer:
http://www.youtube.com/watch?v=Olw8-...eature=related