How can I drop the rear of my truck 3 more inches?

[Reziel_1983]

Right now I have 2" of drop on the rear with drop shackles. I plan on buying 2.5" drop spindles for the front and I would like 5 inches of drop on the rear for a 2.5/5 drop. Is there any way that I can achieve 3 more inches of drop without a flip kit? If I do have to use a flip kit, I believe I would need to go back to stock shackles or the rear would be much too low. Am I going to need to c-notch with only 5 inches of drop on the rear? I would really like to go for a 5/7 drop but the truck is my daily driver and 2.5/5 or 3/5 seems more reasonable for a DD truck to me.