If you swap to Maverick or Granada disc brakes and spindles, the ride height will not be affected (where do people come up with this stuff??). The width is also not affected. The Granada chassis is wider, but the spindles are the same as Maverick.
This is the website I used and its great because they sell the kit but they also sell each part individually. http://www.discbrakeswap.com/Mustang Disc Brake Conversion Kits Parts SWAP.2.html they were a great help and got me everything i needed to do the whole swap and it wasn't to expensive
I'm just wanting to buy a kit brand new from somewhere. Any links? Sorry the link above doesn't work at work. I will try when I get home.
Expensive, but damn they are nice: http://www.wilwood.com/BrakeKits/Br...ption=Drum+Brake+Front+Spindle&axle=Front+Kit Micah