If this is going to be a dedicated drift machine just have the thing welded so its locked closed all the time.

With the rearend left open it wont last many events before mechanical failure sets in.

also the drive by wire throttle system is going to be a pain for you as well. It has a slight delay from your foot pushing on the petal and the throttle position changing. Its only a fraction of a second but im sure that would make doing a controlled drift a pain.

Other than that the crossfire would make an excellent drift car.