OME on 1st Gen
Just installed that kit myself & extreme novice at wrench turning.
Leaf springs are straight forward, did mine one side at a time. Make sure to re-check torque on u bolts after 100 miles or so, somewhere around 80 ft lbs is what I did.
I did the torsion bar up front, not the best choice. Had to order new Nuts and bolts due to stress and fatigue on the OEM parts, seemed to be common practice. Only got about 1" up front and just over 2.5" in the back. Removed shortest leaf spring and leveled out a lil closer but still not to my liking. Off to 4Crawler for a set of the 1.5" upper ball lift. Parts arrived but now awaiting new upper and lower ball joints since I'll already be tearing into the front end.
Overall easy and expect a day to do depending on any rusted bolts and such. PB Blaster the night before will help, but take your time, double and triple check.