Depending on the PP you would like to run or how light you want it, add some weight to the front of the car to bring the balance close to 50/50. Racing brakes and run front around 5 if running racing tires or 3 if street tires. Run rear around 0 to 1 for brake level. Set adjustable diff to 7/14/30. You should find this combination very manageable. Depending on the track, controller, and driving style you may find this set up could actually produce a touch too much understeer during corning, particularly during trail braking. This can easily be adjust by slightly backing down the braking adjustment of the diff to low to mid 20's or move some weight balance back to the rear slightly, possibly run a 47% / 53%, front / rear level. Once you get a decent baseline with these two pieces some fine tuning with spring rates, camber, and caster become easy.