It says that the parts can be custom ordered. I think almost all parts on the rear end can be changed it would hopefully just be a lot of measuring and fitting to get it in there. I would just make a 4 link but I am not sure where to even start. I am an import guy and have not delt with or even looked at a 4 link. I would have no idea where to begin. Its not that I could not do it, just that I would just be worried that something would be mis measured and ruin the set-up. Is there maybe a web site or a book explaining in detail how to set up the back halving and the 4 link?