Just knocked this out in Photoshop (CS edition funnily enough).
It's my take on what the 430 CS might look like. Basically I took the wheels from a 430 Challenge car, and the wing mirrors from a 360 CS and shopped them onto a Novitec 430 (having removed the rear wing) to achieve a slightly more aggressive body shape over the standard model.
Annoyingly, I couldn't figure a good way to 'unsmoke' the rear lights.
Don't be too harsh on me... it's my first attempt at this chopping lark!