[PGSigns]

That setup will come with a rack. You will still need spindles, brakes (Complete system), a rear end if going to 5 lug, exhaust to fit up under the lowered truck, maybe a drive shaft, the parts to adapt your steering collum, wheels and tires, and a host of other bits and pieces. You could easily double the price of that kit. On a limited budget you could work this in stages. Convert the truck to 5 lug first, getting the spindles and front disc brakes and master cylinder done. Get a set of wheels and tires and drive the truck till your wallet recovers. Then buy the drop members and air ride as you can. Collect up all your parts over time and then do the truck. This is a big undertaking if you are going to do it on your own and looking in the projects section will give you some idea of the scope of this.
Jimmy