***k trading someone. ***k chasing down the parts. Unless you have a boneyard with 8 coilsprung trucks at it locally, dont bother.
Go order new springs, blocks, ubolts, and if the shti is rusty hangers, shackles, and bolts. Word to the wise, remove the bed. You don't have room to run a ratchet or hammer and punch back there. Inspect your brake lines while there, especially with the bed off. Unhook the rear driveshaft at the pinion so it doesnt bind up on you locating the springs. You will need huuuuuuuge jackstand with high capacity to do this. You will need a good torch, 3/4 inch drive wrenches and sockets, and have liquid wrench there too. You'll need to reset your carrier bearing bed plate.
The front end on your truck is easy as hell.
Seriously though you need stands that will hold the truck and up about 45" from the ground to bottom of frame. You can set the axles on anything. Blocks, 2x4s, etc. I used 6x6 notched and nailed it to a longer 2x6 block. The axle isnt thaaat heavy. I picked mine up.
Remember: the pinion is going to find its center of gravity pdq when you unbolt it.
I just did this to my truck and its not fast or easy as far as processes go. Its way easier to lift a truck than what you want to do. That said if you really want to do it, be cautious and make sure you have all the parts BEFORE you start. Theres a good deal of shti you need that may have forgotten.