Stepped control arms

[Hottrucks]

ok guys looking for some insight?? I bagged the front of my truck with less than desireable results (not low enough) so it looks like back to the cutting and welding I think I will start with stepping the the lower A arm..so heres the question how much (15" wheels) I was thinking 1 1/2" I want to make it so there is some adjustment in my camber so should I take some out ( how much??) of the lower control arm...I also plan on making the cut in the top to elimnate some of the ball joint bind....and.... If that doesn't get it low enough I want to build in the lower cup for the air bag ( but I want to check scrubline with the stepped arms first)

Help outI would like to do this in one pass if I can

thanx
Jeff