--MJ main
--Exp main
--Exp #2
--MJ # 3
--Exp overload
got Pete 20.75" hub to fender flare. Stock is ~20.50", that's .75" drop. A complete guess on my part would say that an Explorer pack would drop the truck 1.5", and going SOA would net 3.5 - 5" of lift.
If you don't want to lift it by going SOA, or just don't intend on lifting it yet, these springs probably wouldn't be a good plan, unless you like sniffing potholes.