"The Subtle fender kit adds 1.5 inches of width to each corner of the car. Depending upon backspace and suspension configuration, you can run up to 9.5 inch wide wheels with this kit", as mentioned by John washington of http://www.reactionresearch.com . Great guy to do business with as well as a quality kit.
Duragg, I was wondering what progress you had made since you last left off. Your project is my inspiration to start with my 73' turbo subtle z kit project, good to see more progress, looking very good !!!! Chris