Unless its a 3.73+, the carrier is of no use. If its a 90 model it will have the one piece knuckles, they are worth saving. The spider/side gears could be used at trail spare's. If the actuator is good you could "good karma" that to someone. If the uni-bearings are good, keep them for spares(only if they are the 90 model) and the drivers side short shaft can be used as a trail spare.
Thats about it!