Ed pretty well nailed it except that they came to the military unlocked at both ends. There are detroits available for both, and I run them in my 715. I think it's a neat truck. No lift, 38" swampers, sbc engine. They come geared with 5.88's, big drum brakes, the noted big 6 lug pattern. I have yet to break any axle (or other bits), but I'm a pretty conservative driver. T-98 four speed, np200 transfer, good stout bits. Front inner axles are readily availalbe and cheap, so you can carry spares and replace them as needed. As Ed noted you can beef up the front inners, but it's a fairly involved and expensive job, and I think Mike(that's his name, right?) detailed it on the web somewhere. I think he's in Nolan's Black Sheep club...rear detroit ~$250, front ~$350. Not sure it's the most cost effective swap...
