For expert advice on suspensions in here,
Tom Mudd is your man. Take his word as gospel
There are many suppliers and many approaches to lifting a liberty, but the list of kits and suppliers that are worth a darnn seems remarkably short. The higher you want to go, the shorter the list.
Take this from a guy closer to the opposite end of life ... In my opinion, if you can't afford any of these, don't opt down for a spacer lift, or any bargain type kits, or cheaper brands. Save up until you can afford the quality stuff. You will be much happier with the result.
https://jeepinbyal.com/liberty-2002-2007-kj/econo-lift-kits-for-the-kj/ome-1-50-lift-kit-kj.html Premium source of the complete range of top quality lifts.
http://boulderbars.com/frankenlift.htm Several options available here.
If you have original suspension, it's probably quite sagged out. You may be happy with new springs and premium shocks.
https://shop.sasquatchparts.com/product ... y-28l-crd/Edit: If you can stand the road noise, you might be happier with a more aggressive Mud / Snow tire.
Edit2: In your desire for larger tires, if you go over 30" diameter, you basically throw away 4th and 5th gears unless you go with 4.10 axle gears or higher, so there is that expense to consider.
IMO better to have a rig that wheels better than people thinks it can, than to have one that looks "super baddass" but can barely go offroad, breaks parts, beats you up and steals your lunch money.