I have a 89 Mustang GT that I have done a few mods for running around corners, so I know a little about this. I would not put them on my Mustang and defonantly not my Bronco.
The first thing is as I understand it the eliminators are designed for Mustang 8.8" 28 spline axels and wont fit the truck 32 spline axels, but I may be wrong.
Second they do not like side lowding at all, you can weld the bearing to the axle, but I have also heard of them breaking the bolts where they are mounted to the axle flange.
Go to http://www.corral.net/forums/
and search for c-clip eliminators thos guys have a lot of experiance with them.
I hope this helps:toothless