Alston or Mark Williams or Chassis engineering can provide the parts but you really need to back 1/2 the car to do it right , a 4 link has 200 settings & can be difficult to set up correctly . I assume you are using the car for track use , for street use it is basically overkill & the 4 link conversions are not adjustable so they work properly . I have found the ladderbar floater system to be better overall with amazing traction without hours of tuning the set up to make it work well .