If you set up a chassis for only RWD drag racing (eg. Top Fuel with squishy rear shocks and the whole chassis designed for wieght transfer), it will give you the best ET. It will also drive like crap if you try to do anythiing else with it. However, if you want a chassis you can actually drive on the street and occasionally drag, AWD rules. There are Skylines that run 9s on street tires.