I also run a Losi 22 SCT 1.0 on a hard packed high grip clay oval. Start by reducing your ride height. The simplest way to do this is measure your exposed shock shaft on both front and rear. Then cut fuel tubing that is half the length of this measurement. Place inside the shock. You can do whatever length you like just keep it proportional. Next add some rear steer to the truck. This helps the truck go around the corner much smoother. Since your left rear already has some toe in leave this alone for now. Take your right rear to about 1 degree of toe out. Since the right only helps with exiting the corner it never needs to be more than 1 degree. Drive the truck and see how it feels. The left rear helps with entering the corner and should be somewhere between 3 and 5 degrees toe in. Take your time and find the sweet spot for best handling. What is your tire rule? Also what exactly is a SCT muscle car class?