I would recommend building an EVO6 From the USED Dealership at Mitsubishi, Its one of the easyes't cars to handel, great power to weight ratio, keep in mind your suspension settings shouldnt be too loose, 7KG Up front 5KG In the back is good to start out with, Make sure your brake settings get more up front also.
Ride height, " always keep it over 100mm front and back "
Stabilizers, 7Front 5Back, or 5 5 if you need more practice.
As for weight, Do a full Race MOD. Remember this is a Mitsubishi Evolution 6, RS i belive. Dont mistake this with the GSR, It should be the last car down at the mitsubishi dealer, it will last you till the Final Suzuki races.