LJ's are fantastic jeeps, my personal favorites of all them. to run 33's is actually quite easy on an LJ and depending on your budget you can either go wild or just have a conservative great ride.
I've owned 2 LJ's, each had a different setup suspension wise. IMO you cant go wrong with a nice OME lift kit for these vehicles to clear the 33" tire. They make a variety of spring options for Jeeps and net a lift height of around 2 1/2 to 3" depending on spring choice, weight load you plan on carrying, hard top/soft top, ect. Many companies sell OME lift kits so I cannot say who offers the best pricing. I bought my kit from a small company and the owner was fabulously knowledgeable regarding OME and their spring choices. I also went with a Long travel shock 3"-5" for better droop. The kit i bought included bumpstops, springs, shocks, spacers front and rear, brake lines, swaybar endlinks. I added on trac bars, front and rear control arms, body lift, mml, ect. The car rode amazing, firm but not harsh and it handled like a dream on and offroad. I think in total i spent 2400 for the entire suspension which included all 8 control arms and trac bars front and rear (JKS), springs, shocks, and everything else i listed above. it gets much cheaper if you dont get the control arms, they alone were close to 1,000 bucks for all 8.
Now my current LJ has a much different setup. Its basically an AEV short arm suspension style kit that revolves around their 3" springs, stinger/slider combo, and tummy tuck. It has shock shifters, aftermarket control arms, new swaybar system (ORO SwayLoc), AEV rear trac bar tower, and all the other necessary hardware. The main difference between these two is the progressive coils. At 3" of lift you need to modify the rear trac bar in my opinion by adding a trac bar tower and add their front trac bar setup for the TJ. Now doing so greatly increases the install time and work necessary to modify the rear axle with the weld on tower and install the front tower as well. It is a more involved installation than the OME system which relied on using adjustable aftermarket trac bars (which i used and worked great at 2 1/2" of lift). Additionally the AEV setup will cost more $$$ by the time you get all the pieces together and then add in shocks. You could drop the stinger/slider combo and just use aftermarket control arms but the stinger/slider/tummy tuck is a fantastic addition in the handling on and off road as well as protection for the underneath guts of the jeep.
IMO its all about the coils though, AEV progressive rate coils are just fabulous. When i load up my jeep it doesn't sag or lose capability/handling. I have a 37" spare tire, pullpal/highlift/arb gear bag, jeep bag all in the rear with my hardtop on and it exhibits no sag after a year plus or a loss of handling. My OME kit came with spacers for a reason and i needed them after a year to compensate for sag in the rear. Additionally, AEV makes a specific spring rate for the LJ which takes into account the extra length and more gear you can carry with an LJ vs. a TJ. Cost wise you'll spend more, close to what a long arm kit would cost you but you'll have a fabulously engineered suspension system with a LCG and a great on road off road capability.
Third option is just to keep your stock suspension and get a highline kit from Genright, AEV, Rokmen or any of the companies that sell them. you'll be able to clear 33's no problem and still be using all stock suspension components.
if you have any questions or whatnot feel free to pm me.
