If you just want to replace the LBJs its really not too bad. I did it on my old FJC ‘07 and again last week on my 07 T4R. Leave the LCA on the truck so you can apply max torque on the C-clamp tool (get the big kit, not the small kit. It can be rented from AutoZone, advance auto parts, etc)
1) lift front end so both wheels are off ground and remove wheels
1a) remove CV from knuckle (either have assistant press brakes, or use impact
2) leave caliper and rotor on the knuckle
3) disconnect the sway bar link from knuckle
4) remove 2 bolts from LBJ to knuckle
5) swing the knuckle forward and secure out of the way, careful not to stretch brake hose and ABS cord
6) remove LBJ stud nut, pickle fork the stud out of mount
7) the knuckle is still held on by tie rod and UBJ. Remove LBJ C-clip and spray with penetrating oil. The LBJ will not want to budge.
8) setup C-clamp press with screw pointing upward.
8a) using. 1/2” breaker bar and pipe at least 2’ long, start compressing the LBJ out. You will get to a point where it wont move and you cant tighten any more. Perfect!
8b) with a BFH 3-5# hammer, hit the head of the screw towards LBJ. The shock will break the LBJ FREE. Tighten, hammer, tighten, hammer, tighten hammer, repeat until it moves without the hammer.
9) clean up the LBJ hole and press in the new LBJ “straight.” If you have a zirk, point it towards the transmission (45* inward). I needed a 45* zirk) Grease joint until you see rubber boot start to change shape. Dont over fill.
10) start the LBJ stud on the LBJ mount with nut, dont torque yet.
11) Reinstall the CV axle back in the knuckle and spin on the 32mm nut tight, but Torque later
12) bolt the 2 LBJ mount bolts onto knuckle, torque to spec. Use red loctite
13) lift the LCA so you can Install the sway bar link into knuckle and torque to spec
14) torque the LBJ stud nut to spec
15) have assistant hold brakes tight and toque axle nut to spec 175# IIRC)
Double check your work and button it up.
I found USA made Pro forge LBJs on rockauto for $25 each. Million mile warranty. Both case and stud are forged high strength and high quality.
Start to finish 90 minutes per side and you wont have to rebuild the LCA unless you want to.
How I replaced lower ball joints on FJ | Toyota FJ Cruiser Forum
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How long have you been running those ball joints? I opted for Senkei three 5, but these look promising.