Ever,

Lee is right- there have been countless discussions on the disk swap. There is a discussion going on right now on the Open board about a company called "Protool" that makes a disk setup that is custom and retains the stock rims, hubs, and shafts...I think.
Everyone will tell you different, but were I to do it I'd do what Lee did (see his link above at the bottom of his post). He swapped out the axles with the more common GM 14 bolt and a Dana 60 and got both disks front and rear, a standard rim, and the ability to get ring gears and lockers almost everywhere.

The stock axles are strong, but rare as a hooker in church and thus if you want parts you REALLY gotta search. The cheapest way to go is most assuredly Lee's way....and most would argue that's also the best way. On a side note, if you get your stock brakes adjusted propperly then they'll lock up all 4 wheels and work as good as you can hope for. Power brake boosters are an option too for the stock ones. Your call.

Congratulations on your new rig and welcom to The Zone.
-B.