Shackles
Add a leafs
Blocks

 

never go blocks i just took mine out cuz of axle wrap but shackles are good i have them but not sure about add a leaf

 

blocks are bad
add a leafs suck
shackles are decent just don't work well with saggy leafs

 

I put 3" superlift add a leafs in almost a year ago and still have 4" of lift. Idk maybe I just lucked out.

 

Shackles because they will help angle the pinon with a lift. Maybe a small bastard pack and a shackle if you have saggy springs to begin with.

 

Blocks suck
AALs work if your leafs arn't sagging
You can never go wrong with shackles

 

shackles got my vote, especially since it helps correct pinion angle. blocks are for fords, and Bro-dozers (lifted street trucks with no reason other then to drive on the street). the best bet is always new leafs, but shackles are the next best bet