When you drop anything lower than 4 inchs in the rear, is when the price of a drop job starts getting expensive, unless you have your own welding/plasma cutter.
I think a 3 - 4 drop is the lowest you can go without C notching the rear of the truck, BellTech... There are alot of kits for that vehicle.
I personally used Drop Spindles up front and flip kit for the rear and added adjustable air shocks for the rear.
I run 4 of there Alts, personally I have owned EA and Iraggi alt's and they come no where near close to the service, quality or performance from my personal experience. You can't ask for better guys than Robbie and Dave.