I think some people may have misunderstood what you're asking. Are you looking to road race, or are you just looking for some track time to have fun with a car you love? HPDEs and the like? If so, you don't really need to do anything to your car, you can just hit the track with your autocross setup and have fun. Or is there a particular class you're building for?
Everything you do for autocross will transfer right over. If you're doing stiff springs, you don't need very thick sway bars; or if you do thick sway bar, you can go a little softer with springs so it's not so harsh on the street. As for setup, as you say, it's unconventional, so it's difficult for us to help you with spring rates, camber, etc., and you may have some experimentation to do. Most people like their cars to be close to neutral, but whether it's slightly tight or loose is a personal preference, and something you can adjust with sway bar or shocks.