it is possibel, yjwrangler just did this exact conversion. it is gonna be expensive to pay someone, there is modifications, you have to cut, move and weld the motor mounts forward.
you'd be better off doing it yourself, and if you can't, buy a 4.0 wrangler. i think he spent over 2 grand doing it himself, buying a used driveline was a big expense though. a mechanic would be stupid to do it for less than a $1,500 labor, on the side. removing xj driveline no problem. installing driveline, and wiring into wrangler, more work.