I used narrowed tubular upper and lower A arms that were 1" narrower. They do clear the stock upper mustang spring pockets as they travel. The upper spring pockets were cut out at the top and brackets welded on for the coilover shocks. I also did away with the stock strut support arms and went with the heidts tubular struts that have brackets that weld on for the poly bushed pivot end. I did have to shorten the heidts struts to match up to the lower A arm pivot point points. I believe there are lower A arms that don't require a strut, I just wanted the extra support. I also run Must II spindles and Granada rotors with GM calipers. Not sure of the wheel offset but my tires are well within the fenders. My wheels bolt on.
http://www.clubcobra.com/photopost/s...6/ppuser/38156