The only difference between a CR and a regular XXXT is the chassis and the VLA arms.
So if you want to make it a true CR you will need front and rear arms, Rear hubs & bearings,quick channge CVDs, front pivot blocks,hubs,spindles,front and rear towers the wheels and a CR length body.
The parts should interchange with the DT as i have a regular XXXT with all of the CR parts on it minus the VLA arms.