after searching around alot i found a guy who drops your axle or sells you a dropped 4" front axle for a measily $300 he also told me if i were to take a few leafs off the front springs i'd get the 5"-6" i want.
as far as the back its a no brainer 5" blocks and long u bolts
i thought alot about doing what your talking about with the front axle but i want the truck to be safe and some what comfortable since i want to take it on 400 mile trips every once in a while. i figured $300 to drop the front and only about $50 bucks to drop the rear seems reasonable.