I have a used Lock-Right locker for a 28 spline Ford 8.8 axle. It worked great when I pulled it out to sell the truck. The person I sold it to is a friend so I put in new thrust washers, c-clips and cross shaft when I put it back to stock. I'll throw in the used ones if you want.
Easy to install in any open carrier in less than three hours if you go REAL SLOW. Will not work in a LSD carrier. No need to disturb the gear setup. If you can change your spark plugs and can read, you can install this yourself without any problems.
Asking $150. Let me know if you have any questions.