[GMC69]

I'm looking at options on adding a limited slip/locker to my truck with the eaton HO52 rear that has 4:10 gears. I read about using the detroit locker from the 14 bolt FF, and the axle shafts, but are there other options that would work?
I don't want to replace the entire rear end as I rarely drive the truck. I'm in the process of replacing the brakes and I'm good with the current drum brakes and 4:10 gearing.