I would recommend not using blocks in the rear. All they do is increase axle-wrap, you know when you get on the gas and the rear-end shutters and rattles the fillings out of your teeth. Go with shackles or an add-a-leaf, you will will get more articulation.
Lifting the front I would use spindles. I would be catious about the Fabtech spindles. I have heard since they became so mainstream that they aren't as strong as they used to be when they were making everything themselves.
The best route is a 2WD long travel kit if you are serious about performance. This way you can get rid of the crappy torsion bars and go with coil-overs. Check out the kit by Dixon Bros Racing
. I have the 4WD kit and it works great. The folks that did my truck use this to race a 1400 truck and they can take 2 foot whoops at 75mph.