I have a factory 4x4, so I have to stick with drums. Trying to up the safety factor I bought a set of cross drilled brake drum rotors which in theory will help cool the brakes (from brotherstrucks.com) along with the power brake and dual master cylinder setup. Now I need to figure out the brake lines. I don't know if anyone has kits that drop in or if they need to be bent. I want to make sure the rear brakes are isolated from the front. Also, I have had conflicting advise on the proportional valve for the rear brakes. I'm going with one just in case. Good luck.