Im pretty sure you can get the YJ kit from one of the companys i cant remember which one it is, i will go search for it then post it. But other sites say that they get very unstable with the missing link instaslled, but so many people are running them and DD with them and say that they are perfectly fine. I would say i trust the people who are using them on there rigs, thats like first hand adivice. I personally like the YJ springs, they flex super good, you lengthen your wheel base a little bit also, but still keep great aproch angle.
well i hope all of our info helps you out, keep us posted on what you do
Millski