TC-4 speed run car
 

I got a tc4 with a diggity conversion,dont plan on racing car its not a current car im interested in racing.But the car is very cool lookin and i wanna just make it into a crazy fast play car.Want to put foams on it,a 10th scale lola body,and im not sure about the speed controller.Was thinking of the castle 10th scale since i can run up to six cell.I need suggestions on battery voltage,do i want six cell?Is the castle good w a four cell maybe?Never built a speed run car.What motor should i get and i also need to know about gearing.Do i just want a lil spur and the biggest pinion i can get.Any info would be appreciated will post pics as i build it if anyone shows interest in my car.Thanks in advance