There is a guy on the forum that made his into a track car. He did an enginge swap to SRT, full roll cage and gutted the interior. Do a search for HDDP (the guy that did this) and you should be able to get a better sense of what you are looking at. There are a number of people here that do race regularly so go down and check out the race tab on the forum.

If your idea of "track" is a track with curves and such this will be a good fun idea. If your idea of "track" is a straight line, there would be better and easier ways to go.