Erik,
I got my 140 amp CS-130 from alternatorparts.com. He will help you get the right alternator for your application. He along with others sell the iceberg mod on his CS-130s. He also has a nice write up on going to the CS-144.
I think a CS-144 will fit if you don't have front tow hooks, the mounting bolts for mine may cause a problem. I never tried one on my 88 XJ but thought I'd go with the upgraded CS-130.
Before you buy the new alternator do the craig H wiring upgrade. In addition to what he has I suggest you add a bouding strap, same gauge as you upgraded cables, from the alternator case to the chassis. I found 24 inch is as long as ou want to have this wire, anything longer and you won't see a difference on the dash board volt meter.
Here the Craigh write up:
http://www.olypen.com/craigh/charge.htm
Martin