I recently installed the RC 4" lift on my 90 Sahara. Had to cut some of the stock bolts, so be prepared to run to the hardware store for replacements. As said earlier, get grade 8 bolts. One of the things I added to the project was quick disconnects for your front sway bar. Ya, ya, but I drive my Jeep daily on the road, so I like the anti-sway bar action. One word of advice, though, when the instructions tell you to re-torque the bolts after 100 miles - DO IT! Those Nylok nuts they supply with the kit do back off for some reason. I lost two while wheeling for the fist time after installing the lift. I also upgraded the shocks. While you're under the Jeep installing the t-case drop, it might be a good time to replace your tranny mount. They're cheap, and you're under there anyway. I bought the stainless steel brake hoses for the front and back, rather than messing with those relocation brackets and taking the chance of kinking the hard lines. I did use the relocation brackets to fabricate stand-offs for the front brake hoses to keep them from rubbing the tires on full lock.
Good luck with your project!
I would recommend heavy duty upper arms. Maybe a heavy duty track bar as I bent these items. I used a rustys track bar and rough countrys x flex uppers as I plan to install these arms everywhere eventually. I run 34 inch ltbs with no problems. The stock ones will probably be fine, but I'm really hard on my things.
3 xj's - 1992 k2500 diesel - 1992 corolla (doubled my money..... after I blew it up) - 1995 yj - ***1997 Jeep TJ***
Just did mine, new kits come with upgraded shocks. Took me about 7 hrs by myself. It was about 100 degrees, or I could have gotten it done sooner. Used a sawzall to cut rear shackle to frame bolts as I replaced them with greaseable ones. Pretty happy with outcome. Impact wrench sure made things alot easier.
Took me and a buddy a little under 7 hrs to do mine this weekend (lots of beer breaks!). A little trick we found if you come across a frozen main spring eye bolt seized, take the nut off of the inside first, then push the shackle end of the spring all the way to the ground and hold it there, put a breaker bar and socket on the bolt and pull like hell, it will come loose. We had two that were frozen and both came free using this method. A stated earlier, an impact really speeds things up.