It's fairly easy
Step 1. Take your budget and toss it out the window. It'll cost you.
Step 2a. Check out Kore3, they make all kinds of kits. Probably costs more, but it's a full kit, easy to install.
Step 2b. 2wd blazer spindle swap. Fairly cheap, if you can find decent parts at an auto wrecker. You can run the blazer brakes, or it also opens a door to get the brackets for Corvette brakes and these spindles (this is what I did, and I'm close to the $2k mark for parts, but I did drop spindles, and all new calipers, brackets, bearings, etc.)
Rear disc kits are relatively cheap and easy, I think mine was under 500 bucks, with shipping and everything. (I got a "Right Stuff Detailing" kit)