Davecenmt2.... I use the t-maxx aluminum clutch shoes... first off they are easier to install.. 2 shoes vs. 3 and they are a direct fit for the cen.... I don't remember what engine you are running.. If its the stock one, don't count on too much.. I run the os 18 and it will pull the fronts on grass with proline maxx tires.. you have to have softer springs in the rear for weight transfer also... One problem with the truck is the engine is mounted closer to the middle of the truck like a buggy than say a t-maxx or savage which has the engine towards the back...