Does the trackbar look like a custom thing, maybe even a straight tube? Or does it look more like a stock one (with a couple of kinks for clearing the diff cover) but with the rod end at the lower mount?
If the latter, maybe it's an early design BC Broncos trackbar. Their current one has the rod end at the upper frame mount, but maybe they made one early on with it down at the axle end.
If so, they would be able to tell you what bushing is used. Although I thought theirs always used the stock type bushing too, I could be wrong.
Frankly though, if your bar has a stock sized eye, I would not use a bushing that allows the trackbar to move fore and aft like that one would if in a stock type mounting eye. If that bushing did fit your bar perfectly though, then it's not even a standard eye so nothing off the shelf (for a trackbar at least) is going to work.
As the others said then, something from another application. Maybe you have a custom upper bracket as well? Got pics?
Energy Suspension is pretty good at sizing bushings. With no part number, maybe you can call them and get a replacement based on it's dimensions alone.
Be interesting to see the mounts on this Bronco.
Thanks
Paul
