So, if i was to come across a posi in a jeep with the same rear end as mine, and i was to pull it and take it home (junkyard)...would it be a simple swap or would i have to mess with the backlash, bearings, and all that fun stuff?

 

If yours doesn't have a posi/limited slip in it now you'll have to change the carrier. That means you'll have to check and reset the backlash of the ring & pinion gears. And unless you're going to re-use your ring/pinion gears make sure the other rear has the same ratio that yours has so it matches the front axles gear ratio.

 

it would be easier to swap your rear end with one with posi,just check the gear ratio 1st