Been getting a lot people asking how to build the arms since this is such an easy swap I am going to give a parts break down....
Here is link to link ends from Ballistic this truck I used Currie JJ but I had them handy so that is why.
http://www.ballisticfabrication.com/Forged-Ballistic-Joints-Bushings_c_141.html
Bushing as you can see there is two option a premade end or just bushing and make your own. You just use leaf spring bushing. When AMC designed the front 4 link setup on the XJ they made with leaf spring bushings since the parts were easy to come by.
http://www.ballisticfabrication.com/Suspension-Bushings-Accessories_c_161.html
Bung ends two choices square or round the .250 wall square is cheaper then the .250 wall DOM by half...
http://www.ballisticfabrication.com/125--12tpi-Tube-Adapters_c_176.html
The steel needed...
5 foot of square or round .250 wall 2 inch tube.
Some 1/4 plate to cut the bracket pcs.
And some 9/16s or 14mm bolts if pull your axle from the JY take all the lower control arm bolts they are 14mm.
I make my arms 29-30" bolt hole to bolt hole. Longer then that is a waste(unless you have 10 inches of suspension lift) but that is your call. Pretty simple I make my frame mounts 7 inches tall to got up the frame and hang down below the from 3.25". I make them 6 inches long and I set the edge 1/4" behind the last rivet of the front body mount. That puts you right in front of the tranny cross member. And saves a ton of work. You will have to trim a little off the body mount on the frame to get the mount a 1/4" off the rivet.