The responses you get for this "Project" you're undertaking should prove interesting.
I have One season of experience running 1/8th scale (Mugen MRX4X), so with this in mind, questions about the Tires you intend to run, along with the front and rear Diffs need to be answered. First, I assume that the SN could only fit 8th scale width Front Tires in the Rear as well as the front of the car, (I can't imagine 8th super wide rear tires sticking way outside the body). Then consider the difference in Front to Rear diameter split, (MRX4X kit default is 69 mm frt, 76 mm Rr), this coupled with the standard Front Oneway diff, Rear spool, near 3 HP of .21 race engine power, are some of the basic elements that determine how the cars steer, (not to mention the "Agressive Driving Style" required).
You might be able to find, via the search function, a link that was posted in these forums that explains "Overdrive" and how this relates to car handling. Also, Mugen Seiki's website could possibly offer their overdrive chart as well as Serpent's site. As others chime in, this could at least get you started.