The front upper link joints are vertical like that to squeeze it between the cat/exhaust and the frame, you can fit a joint flat there but you cannot get the bolt in or out. We are using a Johnny joint there, it has plenty of angle for that application.
There is a single rear upper link, mostly for packaging, there is no room outside of the frame to make the rear upper arms much longer, they are too short IMO if you put them outside the frame like others do. Performance wise there is no real difference, a 3 link+track bar can work better than a 4 or 5 link if the geometry is right. A link suspension system needs a total of 4 links to constrain it, 3 + track bar or 4 with 2 of them triangulated. The stock jeep is a 5 link and is overconstrained so the bushings and arms have to deflect a lot to keep it from binding. A 3 link +track bar will articulate a little easier.
Here is a shot of the upper link mount
Last is a shot at the top of Jackhammer
Those of you that think you know everything really annoy those of us that do!
Last edited by GOAT1; 12-04-2011 at 09:43 PM.