You will need:
Both WJ knuckles
Balljoints can be XJ but it is recommended to use WJ lowers - I haven't and don't notice any issues
WJ brake parts, including re-drilled discs (Or Ford Explorer Sport-trac rotors)
a 6mm spacer between the hub bearing and knuckle (I bought from JKS)
01 unit bearings to give correct disc in caliper alignment (or space caliper with washers)
4x Tie rod ends
drag link and tie-rod (I bought JKS ready made 3/8" wall threaded tube) - WJ ones are too long but you could shorten
Track bar relocation to get the angle to match the draglink - it will need a new axle end over-axle mount and also body end mount.
I also flipped the mounting points for the TREs in the knuckles with goferit inserts to gain clearance and flatten steering angles.
It's quite a bit of work but gives nice geometry that works well with my long-arm lift (6" ish) and the brakes are bigger with twin piston calipers and help with the bigger tyres and weight. I built most of it myself but did get the knuckle spacers, goferit inserts and axle-end trackbar mount professionally welded (I might do that myself now with better kit and having had more practice).
There's some good write ups with pics on NAXJA and I'm happy to get some photos of mine if you're doing it and have any questions.
