I've been wondering lately if all 9 inches were the same width. Or are any narrower than the rest? I plan on putting one under my Camaro, and I want to make sure before I buy one as I come across stuff all the time. Also, were the lincolns the only cars with disk brakes on them? Or would it be wiser to find the diff and adapt disks for it? Thanks. It's not what you buy, it's what you build!