Quick control arm relocation question

http://www.vintage-mustang.com/topics/faq/controlarm.html I had ignored this mostly due to talk of it needing a negative wedge kit. Is that true that it needs to have a negative wedge kit like shown in most part magazines or would that be just a free mod? If it is I'm gonna do it this week but I had always heard i needed other things.

BTW I tried the search feature and I've heard some talk of shims or somethin...but it seems to be free....For the template after I print it out...do I just like..use a magic marker to mark it onto a piece of metal?
 
To do the 1" shelby drop you dont need a neg wedge kit, its a free and very worthwhile mod. If you were to drop the upper arms more than 1 inch you would need the neg wedge kit.