I think the turning radius is now about 2 feet larger, IIRC. Anyway, the first time you need to make a u-turn, you will notice it.
Another aspect that I forgot to mention is the wider track width (if you use the Wilwood brakes). The Mustang II style spindles kick out the wheel about 5/8" on each side when Wilwoods are used, so if you are buying new wheels soon, size them according to your new spindle geometry and not your stock spindles.