You could swap to an 8.8 from a fox body Mustang or a Ford Ranger a lot of the Rangers came with posi as did Ford Explorers, the Explorers are wider however.Parts for these are EZ to come by you can find info on reading the VIN tags on a Ranger t0 determine gear ratio and if posi at The Ranger Station - Your Ultimate Ranger Resource so you can check out the local Pick N Pull for a bargain.