71 gmc rear leaf only drop. A few qustions for the experienced folks.

[PaPaStewySnipes]

Ok I'm intresting in doing my drop 2/4 or 4/6 but I'm stuck at which will work best for me or if may even work at all with out c notch. My rear is leaf only. I'm running 18" TTII which do have some back spacing 18×7 4.24bs and rear is 18x9 4.5bs, I want to order my parts by Monday and am in the need of some experienced advice. For the 2/4 drop I can do 2" spindles and new hanger and shackle for rear end, correct me of I'm wrong and I do not think I will have a prob hitting my frame and will get 3-4" rear drop and this will level out my ride from my measurements. I have a picture below with my spacing to work with. If I want to go lower and do a flip I think I will be very close to frame or even hitting it. Seems as if the truck is lowered some already, not sure. My rear leafs only have 3 bands and an overload, is this normal or were some removed already to have a bit of a drop. If I do flip kit I can remove or trim bump stop as suggested and do spindle and springs in front to match. Any insight to my predicament will be extreamly helpful.