A flip would be quite a bit more then what your looking for. A flip will do between 5"-6" depending one how thick you spring pack is. Look at it this way: Half of the 3" axle tube...1 1/2 + the perch 1 + the height of the spring pack 2 1/2"?
I was where your at about 5 years ago, looked pretty good, but should be a little lower. I had done something very similar...I moved the frame down on the front perch & re-drilled the frame, put in drop shackles after removing the bed brace completely & then took the rear bracket loose from the frame & let the truck down until the shackle was 1/4" from the floor & re-drilled the frame.
After a year or Two, I did a flip on the axle, put the front hanger back where it began, flipped over the rear hanger/shackle & did a 2" angled (front to rear) body drop. to end up "the right" look. Lorne

