said that a new steering stabilizer and an alinement to fix my death wobble.
whoever told you that is an idiot.
Steps to start with for a YJ
1. REMOVE steering stabilizer, it will only mask other worn components.
2. Adjust Toe-in, measure from the center point of your front tires, a front and back reading, adjust till about 1/8" of toe-in. For more detailed info Search
3. Make sure you leaf spring bolts are tight, and shackles are not bent. By tight, dont go wrench on them, they should be able to still turnn when at torque specs, if not your jeep will ride hard as a rock.
4. check your front shocks, make sure they are tight, and not completely worn.
5. Make sure you ball joints, wheel bearings and all tie rod/drag link ends are in good condition
I drove my YJ for 7 years as a daily driver. If WAS NOT stock during that time frame. Trackbars came off of it when it was 6 months old with the first lift and never went back on.
I did periodically use the sway bar though.