To get the correct answer we need to know what you plan on using this truck for. What type of terrain do you use it in? How many street miles does it see? Size tire you are or want to run?
Lots of people get wrapped up in the 52/56/64 swaps, but they are just trying to lift a weekend warrior/daily driver type rig they might tow with.
The 52's and 56's up front are an easy cheap way to get 4-5" of lift, but also require crossover steering, longer shocks, taller shock towers, long brake lines, custom driveshaft to actually get the benefit they provide. The downside of them is they are very soft and driving on the street can be a little sketchy,
52's, 56's and 64's in the rear with a shakle flip is also an easy way to lift the rear and get lots of suspension travel. The one downside of the rear is the longer springs really require some sort of anti wrap bar to prevent turning the springs into a W shape. This has to be built properly to retain the benefit of long flexy springs.
IMO 52's up front and 56's in the rear will travel more than enough. Before I installed bumpstops and I destroyed a set of front and rear springs I could max a 15" travel shock out in both directions.
Honestly for about 80% of this site how the average guys are using their rigs a good set of BDS or Tuff Country springs up front and a shackle flip in the rear DIY, ORD, SKY will suit you just fine. A decent set of shocks and some brake lines. No driveshaft mods are usually necessary for a 4" lift, but some people do run into some vibes in the rear.
Just my .02
, remember back in the day when every 18 yr old hotrodder wanted a tunnel ram cuz of the way it looked? pssst, check the rpm range, ya sure ya wanna run that on the street? 
