Need a little lowering help

[braggwood]

I have a 72 chevy lwb, 3 inch drop spindles in the front, 4 inch coils in the rear and would like to go lower ( as much as possible) without any major modifications. I am looking at a rear frame notch, front and rear air bags. How much more would this lower my 72? Is there anything else I would need to do with these? I have been to suicidedoors on the air ride but didn't know which kit would work for me. Any suggestions on kits, part #'s or somewhere to buy? Thanks for the help!!!