keep in mind welding that a factory C4 crossmember to your frame is about like welding a tin can to an anvil. The C4 stuff is good stuff dont get me wrong but I would look at getting with Bob over at Progressive and talk to him about one of his crossmember to convert it over using your C4 stuff. Then you dont have to re-engineer anything and the rack, proper ackerman, track width is already figured out for you.
