Get the tires mounted/balanced, load em up and come home.

Bust out the floor jack, jack stands and get ready for some fun.
Chock the front wheels front and back. lift up the truck fairly high and play the jack stands under the frame, towards the back (prior to the bend for the rear axle house to articulate).
This will allow you to articulate the axle to replace the springs.
One guy lifting up on one side, while the other presses down on the opposite side, the spring should come free.
Repeat and install the new spring.
You should be abe to articulate the axle enough by doing this, if not, remove the shocks first.
You're gonna need to replace them anway.
Once you have the springs replaced, install new longer shocks.
Cycle axle articulation and verify your soft lines (brakes) arent being pulled on with too much tension.
Install new rear tires.
Lower the rear and chock those wheels.
Lift up the front and crank on the tbars (probably need to hit the adjustment bolt, shock mounting hardware, etc with pb blaster a day or two prior.
Replace shocks with new longer ones.
Install new front tires and lower the front.
Cycle the steering and check for rubbing/close calls, etc with the fender liner/tires.
While cycling the steering, stop at the closest point and cycle the suspension and determine impact(s).
If it rubs or close to rubs, trim liberally plastic, fiberglass, metal, etc to clearance the tire.
Hit it with a light coat of paint/primer.
Drive around the block and scissor the wheel back and forth to dive the front corner down @ ~30MPH. Best on road test for rubbing I know.
If it rubs there, trim more. You should see evidence of rubbing on the fresh paint.

Enjoy your lift/tires. You are now done. Congrats, you now have time to come play in Buena Vista Aug 10-13 with the rest of us @ Co Zu 8!

OR
Come to Denver and let us help you with it.

Lifts are a SNAP, and fairly easy to do. I mean, cmon if I can do it, ANYBODY can!