I covered most of this in my PM, I'm just posting it here for any other readers.
The lowering hardware is pretty straightforward. You'll need the DJM 4/5 kit and appropriate shocks to start. From there you'll want
Front:
Cut springs to taste. Cut a little at a time until you're happy with how it sits. You'll have issues with negative camber with anything more than a 2 inch drop spring, so be ready to go through tires faster than normal, or modify the upper control arms to correct the camber/balljoint angle. You may also have to remove the inner fenders to avoid tire rubbing depending on wheel/tire combo.
Rear:
Flip kit= 5 inch drop
shackle flip (stock shackle)= 2 inches
shackle flip (lift shackle)= whatever size lift the shackle is designed for. Requires cutting the bed floor.
Lift block= depends on the block (only works when you have a flip kit installed)
Belltech Drop leafs= 3 inches
The hangup is all of the other stuff that you run into to actually drive that low. When you drop more than 4/5, you'll need a frame notch and low profile transmission crossmember minimum. From there, depending on how low you want to go, you'll need to start cutting. Things like tie-rod notches, cutting the bed floor, modifying or replacing the inner fenders, getting a fuel cell, custom upper control arms to correct camber, etc are all going to come into play the lower you get. They increase the amount of work, as well as the cost.