It's pretty strsight forward to do. Just don't remove the top leaf spring...The bolt at the front of each top spring is a pain in the arse. There's a welded nut on the inside of the frame and most times you'll either snap the bolt, or break the welds on that nut. Then you have to start cuttin the floor to get access to it.
My suggestion is to take the leaf spring packs apart and replace the other springs. I've done it many times.