These kits are way too much to buy. I did my own a few years ago and Copied there brackets. I did not do some half ass job. Nice bends and welds with powdercoating. When you do it yourself you can be proud that you made it and learn things on your truck. When you start doing SAS its not just the bracket price either. There are tons of little expenses and big ones. If you want to do it the right way and look clean the least you will spend is 5grand on the whole SAS. Now this is not junk yard crap thrown on to add up to this. My advise, Dont do it. Save your money. Go by something that wont be a daily driver. Most will say the same who have done this also.
My Vote. NONE
I respectfully disagree.
There are a handful of things that may or may not bite you in the butt trying to do this your first time out on your own. I got bit pretty good with my progressive rate coil springs, getting my ride hight where I wanted it and my coil buckets not being to far out.
The ORD kit, while I am sure it has down falls is a lot of product for price I think is very attractive as well as the fact that the bracket/hanger does not lift the truck so high its self like the sky kit. I have a friend with a 88-98 kit and while it may not be bling, made of 3/8" ...Id say it is a good purchase with a fair price.
There are plenty of cost that run right along with doing this swap, exhaust, tires, drivelines, regearing, steering, ride hight changes, rear springs or blocks or hangers or shackles, shocks, or or or or or ......
Any single one of those can blow a entire night, day or weekend or hell even a week and leave your truck unfinished till you sort out the problem, fix it or wait for the part that you broke, was missing, didn't fit etc..
If it makes any difference I will most likely be using their kit when I put a solid axle under my 06 daily driver 3/4ton and I already have a learning curve and know what I am doing having already been down this road on my 07 as well as some friends trucks.
My OPINION, is that you go with the 500.00 leaf kit from off road direct..
Get the kit on; work out your drivelines, shock choices/changes, have your exhaust moved, get your crossover and steering not only on but to your liking as well, work out any potential axle repairs, maintenance or death wobble issues, your tires and wheels etc, ride height changes and preferences..
If you then decide after all of the headaches and hurdles are over and you have drove it for a while that you want to convert to a radius arm, 3 link, 4 link, air bags, coils, coil overs, ori's go for it. You will already have your learning curve, much more knowledge and probably make the right decisions or possibly even just be happy with the truck the way it is... and if not.. you can always sellthe 500 hanger kit and get at least 70 percent of your money back.
So in closing.
this kit
http://www.offroaddirect.com/88-98-Chevy-solid-axle-conversion-kit-leaf-springs_p_9.html
plus this knuckle and steering kit "if you are using a 10 bolt or 44 axle"
http://www.offroadunlimited.com/orustore/pc/viewPrd.asp?idcategory=20&idproduct=8244
Call this number with Phoenix rack & axle 602) 252-8255 for driveline questions, help or to have yours built. They have done at a minimum of 40-50 of these for my truck and a friends hot rod shop, some of those with serious power numbers

Ask for steve or Berney in the back and tell them Shawn with the big white truck in Az sent you.. You should be happy with parts, price and that little forgotten thing nowadays called service.
For springs... id call up offroad direct and see what people are happy with for the hight you are looking for, I personally run Deavers and and led a few others to like their stuff too, but it is a bit pricy.. but they are quality.
Shocks, 5150 bilstines
Tires.. anything but irok radials
Good luck
-shawn