the basics are put car (not rear end) on jack stands, unbolt and repalce one at a time, support car under the axle (jackstands), tighten all bolts.
I did one at a time, had to remove my rar brakes in order to get the two lower bolts out. SInce I was doing te springs at the same time I removed those first.
It is not a hard job jsut time consuming. It is only 8 bolts and since I was swapping the rubber for poly insulators it took me probably 6 hours total to do the rear arms.