The other things that might be problems for roadcourse work is laying down power after the apex (unless you have some sort of limited slip diff), and axle hop under braking.
Not trying to change the topic, but the level of your track experience is going to mean a lot (OK, more than a lot) in terms of sorting the vehicle. Unless I am missing something, A-arms aren't going to stiffen the front end. Increasing your spring rate in coil springs, would. As would less tire pressure and a number of other things.
http://www.rogerkrausracing.com/TechSheets/overunder.shtmlI assume you are trying to reduce oversteer. That is problematic with the weight distribution and lack of chassis adjustments in this vehicle, in my opinion.
