I was a little worried about this. When I pulled the front diff fill plug I could barely get a wrench in there. I ended up buying a special short 3/8" allen socket and using a low profile socket wrench (my backup plan was a stubby allen key, which probably would have worked fine). I couldn't get my torque wench in there (something I didn't mention because I'm still thinking about if/how I should try to get a torque wrench into this tight spot). Somewhere on my to-to list, I plan on looking at this a little closer. If anyone has recommendations on fixes/replacement parts for this I would appreciate it. Otherwise, I will eventually get back around to researching this.
Rockjock/Currie track bar.
https://www.rockjock4x4.com/CE-9120TJS