First rule of Jeeps - a simple job replacing a part is never as simple as it seems. If you're replacing the throw out bearing, you might also consider:
1) Replacing the whole clutch
2) Rebuilding the transmission and
3) Replacing any wearable parts like transmission mounts and bushings
Especially if you've owned the jeep for a while and don't know the last time any of those things were done.
The throw out bearing is a $10 part that takes about 10hrs to replace for a novice, then another 8 to do it again because you messed up the first time. It's good to consider anything else that might need doing while tackling that big of a job.
Second rule of Jeeps - if there's an adjustment you can make to get a little more life out of a part before doing a job like that, it's worth considering. You may get away with adjusting your push rod length (if it's OEM mechanical), by making it just a touch longer. Be sure to look over the mechanical linkage for any signs of wear.