[Mike C]

Everyone offers a kit that can get you there, but be careful what you ask for...

With 4.5" front and 7" rear drop (no c-notch, leaf spring flip) on mine, I have no issues. But when you go to 5" or more in the front it may not align and with 7"-8" in the rear you must notch depending on the front.

But if you want to drop the rear a little more, get a 5" or 6" spring. If the 6 is too low, you can pull the 2" block for a 1". But I'd stay 4.5"/7" to keep the truck as useful as possible.