Google elocker retrofit
I have done it on my 88 runner
You can do it to any 8inch axle housing 4 or 6 cylinder
You need to cut a section out. Fill two holes with welds and drill and tap 4 new holes.

 

Wabbit: yes, I watched that video a while ago. And I want to go with an elocker anyway. But I was just wondering if anyone has had any problems with the zip while driving.

Toyo: ok, and I'm assuming a shop could do that for me at a decent price.. I literally have no spare time around football and school. Plus I need to get my other Toyota running and sell it ASAP.