I can do that.The brackets GT289 posted are not the reinforcement you need to look for. They are just the hanger brackets. That hole area about 7"x13" around that bracket will be reinforced with a second layer of sheet metal on the interior side. I'm not home right now or I would post a picture.
Its a myth that K codes had to have disc brakes, they had a lot of the GT special handling items as standard, but Disc brakes weren't mandatory unless a GT.Ah, true, except the first year of production disc brakes weren't available. But then, neither was the GT.
The link provided by 63BGT66 is pretty good. Here’s something else I found on the Mustang Monthly site several months ago when researching GTs: How To Spot A Fake '65-'66 GT - Mustang Monthly Magazine
This article was one of the worst articles, if not THE WORST, ever written by THAT author! THAT AUTHOR took a several years older, same topic article written by someone else, including same pictures, and put HIS name on the article, AND pictures by him!, with more erroneous statements. The first article, written by a previous MMonthly Editor, was not totally accurate. It was years ago, mid 80's or so, and not everything was then known, I guess. A person in the Fl. Keys, copied the first article with the then recent J. Ford article, and sent it to the publisher. He brought a copy of his letter,with copies of both articles,, to our Mustang club meeting for us to read. We looked at it, laughed, and pointed out errors, etc. Someone there had a 65GT and we kidded him about not having a GT gas cap! as the article stated. 65's did not have a "GT" cap. Am surprised that they, MMonthly, even put that article on line!
It was a lesson on plagiarism at it's worst!