What tire are you going to run on this track?
If you run on rubber tire, you might like to just stick with the stock setting but you need to reduce camber to rear/1'-1.5' and front/0'-0.5'
use lower gear ratio as compare with the stock box pinion. start with 17/21 and go down on the gear ratio if you think you dont have the speed on the straight. as for clutch, you might just stick with the stock clutch for a while but you need to change to a bit harder spring. Kyosho made a harder spring which is color in blue. rather then that, stay with the box setting overall.
One thing about building the shocks, there is another tree with two spring bottom retainer which is in dark blue color and it is flatter which allow the long spring seat lower in the rear. I see a lot of people miss that part but use the retainer which comes with the shock parts tree.
Hope this help