So im really looking into the idea of 4 linking the rear of the xj. I built my own front 3 link, so I have no problems doing it.

My plan is to weld my lower brackets straight to the unibody even with the unibody rails. I already frame stiffs. SO Ill wled those brackets straight to the unibody, maybe pointhing them out 10 degrees to give the lowers a little triangle outwards. Then for my upper link brackets, Im going to plate the unibody a good foot and a half on the inside of the unibody, then weld the brackets straight to that. (Exactly how I did my front 3 link with the brackets) So weld both brackets to the inside of the unibody. Then uppers will triangle to a full truss im going to build on my 44. Ill build my own coil buckets. So that pretty much takes care of all the pieces.

Ill be using trail gear creeper joints on my lowers 2" .250 wall DOM, and 7/8th heims on my uppers 1.5" .250 wall DOM.

Will that work out ok how I plan to do it? Should I keep the lowers straight instead of pointing them outward a little. Will the uppers have enouh triangle being on the inside of the unibody rails?

Do I want the lowers to be longer, or the uppers to be longer? And by how much should I make which ever link longer?