I moved your thread to the seriously lowered suspension sub forum. Take a look around in here, and the street truck registries.
Without a doubt, the best way to lower your truck about 2" is with this kit of parts designed to work on your explorer
http://www.explorerexpress.com/xspec-suspension-complete-9801-explorer-p-916.html
Sure you can just get some blocks for the rear, but they will not give the best pinion angle. Also, the u bolts in the kit are weak and the wrong size.
Search around and you will find what you need. The kit I linked above will give you a stance like this.