It isn't that bad so long as you plan it out. You need a couple of sets of jack stands, one set goes under the frame near the rear leaf spring hangers, the other set under the rearend itself but these need to put at a height where the rearend is just above full droop. The reason for this is that you are going to leave the the rear end in place and just replace the springs (or you can remove all of it as well but this means disconnecting the brake lines which means bleeding them post event).
The hardest part of this is removing the nuts from the U bolts that hold the rear axle to the springs. Due to how they are installed the threads are exposed to all of the road grime, water, impacts, etc. so those nuts can usually be a *****. My advice is buy new (correct) U bolts and nuts, then just cut the old ones off using a cut off wheel, torch, etc. (torch works great).
Once you have the rear end disconnected from the springs, then its just a matter of removing the rear shackle through bolts (you can do just the ones on the springs or the ones on the frame, I would do the frame as they are usually a bit less jacked up and it will allow you to replace the busing there). Don't remove the bolt after getting the nut off, keep it in until you get the front hanger bolts off so you are not fighting the weight of the spring. On this note, you want to remove the 4 9/16 nuts off the front of the spring hangers, not the 1 big through bolt. Once you remove the 4 nuts the spring should want to come down, then remove the shackle bolt.
Installation is the reverse. It isn't that hard but a lot of it has to do with what tools you have available. You are going to need a 1/2" drive socket set with a breaker bar for the shackle bolts along with a 3/4" wrench. If you are going to try and get the U bolt nuts off you are going to need at least that breaker bar and perhaps a cheater bar for it as well and perhaps even some heat from a Oxy/Acetylene torch. I just need one the other day and out of the 8 U bolt nuts 7 came off with my 18V Makita impact (200+ ftlbs of torque) but one had to be heated red hot (several times) to get off. I could have just cut them off but I was being stubborn.
Look, many people do this all the time in their driveway without a lift, on a scale of 1-10 where 1 is near impossible and 10 is super easy, this is probably a 5 or 6 only because of the planning and tools required as well as the rolling around on the ground part.
