Quote: Would camber help in the rear? I remember Rusty Wallace of NASCAR got caught using some sort of trickery to camber the passenger side wheel on the rear. I never saw how but my thoughts were full float rear and a CV inside. Certainly this could help a solid rear perform better to a small degree.
The circle track guys to it with thier floater rears by having beveled splined ends on thier axles. Then just bend (heat/weld quench) the axle tubes.
You can get 1/8 degree just bending the banjo housing of a stock rear. It's not going to explode. But not going 100K miles either. I've heard of dedicated autocross cars getting 1/4 deg or more out of a stock straight axle. Trailered race cars basically.
Road racing in Oz isn't cheap... but it is quite popular. Lots of cars built for it, sicne there are quite a few not only track, but open road races as well.