Hey Truperman, I speak from experience when I say pay for the spacers if you value your time. I built mine and it took me about 3.5 hrs to build them. Plus the fact that I had to disassemble my front end to remove a ball joint just to make a pattern. Yes of coarse you would have to do that to install them but I am referring to the added 30 min. just to get the part in which you need for the template. Total time 4hrs. So lets say that I rate my labor conservatively at $25 hr......$100 for a pair.