uh...i have seen 4 links in many off-road applications. i know that they ride way better, and the suspension can travel better. i also know that drag racing types like to use them because they keep the rearend on the ground better. it is a superior setup to leaf springs in many ways, the only thing that i am unsure of is its ability to handle a alrge load. my friend has a chevy with 17 inches of lift on it and it has a four link rear end. he mashes the hell out of that thing and it has never broken and even tows a boat well. he claims it rides twice as good now. i think that it is worth looking in to, it may be expensive, and it also requires a lot of careful measurement and calibration once installed. everyone i talk to who has one loves it though.
