Here is what I posted in your other thread, and I bought my stuff from ORD:
I went with 6" TC EZ-ride springs up front, an ORD 4" shackle reversal in the rear, 4" TC EZ-ride springs in the rear, and left the front sway bar off. I have one Bilstein 5150 shock on each corner and the truck rides very nice. I also did crossover steering though while I was at it. At first I also did a zero rate in the back for a total of 9" of lift in the back. This is due to the D60 up front adding about a half an inch or more to the front over the D44 and the usual sag in the rear. Once I was done, it sat a tad high empty but with a load was about even. Then I pulled the zero rate and fabbed my own zero rate from an old spring to drop it a bit. Now I wish I had left the 1" zero rate in as it sags under load. For your application leaving the stock axles, I'd do the 6" up front, the 4" shackle flip, 2" springs, and a 1" zero rate can be added later if it sags with a load in the back.
Also, if you have a 700r4 tranny, I'd swap in 4.56 gears. If you have a TH350, I'd probably do 4.10 gears. Either would work fine though. Also, keep in mind that changing the backspacing on rims to make the tires stick out more places more wear and tear on your wheel bearings since the tires aren't centered on the outer suspension as designed. I think leaving the stock backspacing but going with larger tires you will be sticking out just fine.