Wow basscat- looks to me like you're getting off on the wrong foot here. Lots of good people here to help you out, but keep up the attitude and you might find the help pretty scarce...
Anyway- to answer your question...
I've been reading up quite a bit on this (read I haven't actually done a swap, so get confirmation on what I'm saying)- I blew out my VC and am thinking of swapping out the 247 for something w\ a 2WD option (ie 231 or 242, maybe even an Atlas).
First- what's wrong with your TC? Most common failure seems to be the viscous coupler. I found a write-up a while back on replacing this- didn't look too hard. Do a search and see what you find. If this is your DD and you're not doing a lot of rock crawling or other heavy offroading, repairing your existing TC is probably your best bet. Most WJ's out there are running the 247 w\o problems- don't let one bad experience w\ this TC burn you on it. The VC is a pain when it goes, but most people don't have trouble with it.
If you're set on replacing it, it looks like the 242 is a direct bolt-in replacement if you can find one. If you really beat on it, the 231 is reputed to be beefier than the 242, but there's a bit more to the install. I found write-ups for both of these on other sites, a little searching should turn them up. The 231 also has greater aftermarket support, such as a 4:1 kit and I think I read about a twin-stick kit somewhere or another as well.
IIRC, JF doesn't like us posting links to other sites, but a google search should turn up all the info you need for either swap.
'04 4.7 WJ 6" Clayton's, full width 60\14b, 37" Nitto mud grapplers, lots of bits and pieces