I know approximately the effect of each part of the setup for a classic circuit, but i don't really know for an oval.
For example, the preload : Is it better to have an high preload or a low preload?
#Oval setup
shrewd star
cosmic aspen
The whole idea is to set up the car to help aid it in turning left. To start, you generally want a stiffer spring on the right side of the car versus the left. This helps keep the car more level while turning. This also makes left turns more responsive than right turns. You would also want positive camber on the inside (tire leaning out) to maintain a good contact patch. The last thing I will bring in is toe. Set up the toe if you can so that the front of the wheels on the front face left, and the front of the rear wheels face right. As for preload/ride height, I would keep it symmetrical along the center axis of the car to start. You can always adjust it later if need be.