A body lift will take the better part of an afternoon. Mark and Myself did it in about 6-8 hours. Its not complicated, it is just time consuming. Keep in mind all the stuff you have to do:

-If desired, use electrical tape to cover body mounts turning them from bright white to black.
-Drain Radiator, disconnecting the one hose, and taking off the fan shroud.
-Pull back carpet to access the 4 mounts located in the truck.
-Remove tail lights to access 2 of the 4 on the rear.
-Remove rear bumper to access the other 2 on the rear.
-Strap up rear suspension.
-Remove plate hiding fuel tank filler hose, disconnect.
-Remove bolts attached to fuel line bracket.
-Loosen all bolts, remove washers/nuts but leave bolts in.
-Make sure parking brake is off, and walk around re-checking all bolts.
-Slowly lift the vehicle on one side, install half the lift blocks/bolts.
-Let vehicle down and lift other side, install other half of lift blocks/bolts.
-Let vehicle down and go around and tighten down bolts.
-Install new radiator hose, re-install upper fan shroud.
-Re-attach fuel filler hose for gas tank, re-install plate.
-Install c-channel space for fuel line bracket.
-Bolt/snap carpet back inside vehicle.
-Put tail-lights back in.
-Cut semi-circles in diamond plate of bumper, then re-attach rear bumper.
-Release straps attached to the rear axle/suspension.
-Cut slit in front of t-case shifter to help with 4-Low notch.
-Re-fill Radiator and let vehicle come up to temperature and check for leaks.
-Test Drive Vehicle, and clean up old bolts etc.

It is a lot of stuff to do, and it helps having a 2nd person when tightening/loosening bolts considering it takes a ratchet on the top and bottom.