I was lowered 3/5 with my silver truck. Didnt have to have a notch, but i did a notch just before it was totaled.
Front was eibach 2.5" coils but they sat at 3" on my supercrew.
Rear was 2" or 3" adjustable hangers, and a ground force 2" shackles.
I was planning to do a 4/6 drop on it prior to being totaled, and I am still grabbing up parts to drop my new red truck.