Disc brake conversion 67 Dart

I do not want to spend any more money than I have to. That kit looks very interesting, I will have to check it out. I work for O'Reilly's ,so, I was thinking that if I stayed with stock stuff, I could get the calipers,rotors,bearings,ect at work. But, if I have to replace the spindles and the upper control arms, I might be better off with a kit.:-D