Modding my T/A for Auto-X

My last car was a '91 Mustang coupe. It had over 500 rwhp and it was a blast at the 1/4 mile, but on the street it was a pain in the ass. The reason for selling it was to get a car that would have very good street manners, which is why im looking into an M6 T/A. But I was wondering how well this would work out. I've been looking at alot of the photo albums on here of people that race in NASA and SCCA and their cars have no interior except dash and a seat with a 12+ point cage and no creature comforts. I wanted to make a nice street car that was fun to drive around town but would still hold it's own at the track. is this possable? im not planning on going for national titles or anything, but just be competitive locally. I wanted to have a system and full interior in my car to keep it enjoyable for myself and all of my friends, but at the same time i want to be able to go out to the speedway when SCCA shows up and make a few laps and do well. is this possable or just a dream?