What Ruffian said is right. I'd also like to add that since there are so many spacer kits for sale, you can pick them up pretty cheap. I got my cornfed from a fellow member for $120. New it sells for $280 or something. What I'm saying is you should really think about it unless money is no option. Because if all you are looking to do is get a little more height, I would say go with the spacers. Your truck will ride just about the same as stock. As far as Toytec or any other "real" suspension kits, it can vary from one extreme to the other, you would have to choose according to what you want.