First off - WELCOME from the shadows into the light.
Second, what transmission is bolted up to the 2.5 for sale? The AX-5? If so, a word of caution, 5th gear in the AX-5 is held in place with a C-clip that has a tendency to crack allowing 5th gear to slide away giving you a 4 speed transmission. Also, the AX-5 isn't the strongest trans out there. If it's an AX-15, you're golden.
As for the swap, you're going to need to get a new steering column. One without the shifter on it. I believe, but I'm sure those with more knowledge will chime in, there's some wiring that has to get changed around as well. I thought about going down this road with my rig and was advised that it was more of a job than it was worth. Not sure how valid the statement was.
1995 Blue YJ i-4 AX-5 33" Cepek Crushers on 2.5" Rancho lift - SOLD October 2010
1996 White ZJ i-6 auto bone stock
1987 Maroon YJ i-6 Auto (1.5" body lift. OME 2 1/2" lift. Rancho RS5000 shocks. Rancho steering stabilizer. A-Z Fabrication rock slides. More upgrades coming soon - LOL)
The "sideways" build thread: http://www.jeepforum.com/forum/f22/r...hread-2164793/