i have always wondered if this was possable. i think it would look pretty bad a$$, but i bet they are heavy as heck. so i guess it would be worthless to me , im trying to lighten up. would they fit though?
No, lightning wheels can not fit on a mustang without adapters. Mustang's have the same bolt pattern as Ranger's (5x4.5) and the F150's have 5x5.5(I believe). So, in short, you will need to have custom adapters made which can not be safe if not designed, or cut exactly right.