bimmer, start with trying to figure out how the Supercar group reflects the Muscle, Inc. approach. If you are having problems with parity the next step would be to trim the garage list. Then, put a horsepower cap to avoid PI exploits if necessary. What you want to be able to explain is why these cars are in this group and why they belong in Muscle, Inc. challenges.
For me, personally, as long as members here have an interest in applying the Muscle, Inc. approach to S cars I think it is a good idea. But we need to keep it as close to street as possible. Perhaps you really don't need the weight reduction. Otherwise, I would rather run American R class cars.
But it definitely needs to reflect the perspective of Muscle, Inc. when it comes to builds. Otherwise, I don't think it belongs here.
DD