1- disconnect shocks, bust all the u bolts loose or off, jack stands or lift under frame...
2- disconnect drive shaft, park brake cables and brake hose (probably due for replacement anyhow)...
3- disconnect rear hangers, then front hangers... and roll the assembly out from under the car so you can work on it nicely...
4- after replacement parts are installed, wheel back under the car and reconnect front hangers...
5- use floor jack under the differential to raise the assembly until the hangers line up... if gravity isn't holding the car well enough, use jack stands or blocks under the front frame rails... use thin wood or sheet metal to allow the rear hangers to slide if you don't want to gouge the undercoating...
6- gravity is your friend, use the floor jack to control the effects while lining up bolt holes... tiny movements...
7- reinstall whats left, good time for a new brake hose that never gets replaced and was likely too brittle to move out of it's normal travel range... good time for u-joints too...
8- Not an aluminum driveshaft... you can buy a ball joint press and maybe a couple of sockets to replace them, there is a special press available if you like to spend money, or you could use a hammer and vise like flat-rate techs did to knock the job out in 10 minutes or less...
Now if you really want to work extra hard... do it all hanging in the air... but I never saw anybody with half a brain try that...
Moral of this story... come on in, ask your questions, but when you act like a dick to the first folks who want to help you... many of us are just going to sit back and enjoy the show. Just so that you know, everyone who replied to this thread has done this job, even on the elusive 74-78 C-Body (it's a car, not a spaceship...
).