I'm w/Marco on this one. It's WAY more than 1-2 hp. Easy mod to do, instructions are here:
http://www.contour.org/mods/mods.cgi?s=howto&display=svttb You do know that the main page of contour.org has LOTS of info on it right?
Call Bill Jenkins to get the parts. He knows exactly what you are going to need in addition to the TB. It works better if you already have an intake on the car..sounds cool too! HTH