Real Leaf Spring lowering options

[corndoggydogg]

Hello. I am getting ready to lower my 72 GMC and add some new wheels/tires. The challenge is, I have leaf springs in the rear. From what I read on the forum, my options are somewhat limited and not as flexible as coil rear springs.

Here is what I want to do:
1) Maintain a reasonable amount of hauling capacity (it is a truck after all).
2) NOT install a c-notch. Too much brain damage.
3) I definitely DO NOT want a "low rider". I just want a lower stance without going overboard.
4) Keep costs as reasonable as possible for the drop and spend most of the budget on wheels/tires. (Not interested in lowering leaf springs at $300-400)
5) I'm not opposed to flip kit, but I am concerned about bottoming out. Just something I don't want to have to deal with.

I am leaning towards the following, as a starting point:
1) 2.5" drop spindles in the front.
2) 3" drop shackles in the rear.
3) 17-20" wheels (possibly staggered: 17"/18" or 18"/20")

I have attached a photo of my truck (blue) and another one I found on line that has the general stance I am going for (black).

Considering all of the above, my questions for the forum are as follows:
1) What kind of drop set-up should I consider?
2) What size wheels would be a good complement to the drop?
3) I will probably do the drop and wheels in 2 phases. Which should I do first?

Thanks everyone!