Drop blocks are self explanitory... 8 bolts and your done,make sure the pins are all lined up. Torsion bars are a matter of loosening a bolt while holding a jam nut and taking a few measurments... If it doesent come easily to you, you should have somebody else do it for you. Just my .02 Where are you located?
Lift rear of truck. Support on jacksands. Remove shocks from lower shock plate. Loosen both nuts on each U bolt. Raise axle with jack. Put blocks between axle and leaf springs. Put in new U bolts and just do everything in reverse.