In addition to what the older than me geezer suggested, you need to consider several factors. I've had both a '55 and '56 with eight inch wide wheels, 3 3/4 back space, in the rear. Both were doable, but required a little "massaging" of the rear wheel opening lip, meaning they had to be "flattened" a little on the back side. Beyond that, it will depend on the aspect ratio of the tire used, and cross section width. Also, these cars are not all built the same from one to the other. Some have less clearance than others, even from side to side on the same car. And that is true even if they've never been hit. If the car has been damaged, especially directly in the quarter panel, it may not have been returned to it's exact, original position. It's also possible to jack out the wheel opening a small amount without altering the appearance of the quarter panel. However, this is best left to someone who knows how to do it (in other words, EASY DOES IT). In front, seven inch wheels, with standard offset, can be a bit wide, again depending on tire size and how much lowering has been done. Usually they hit at the top center of the wheel opening at the extremes of turn in, especially when entering a drive apron. If the tire "hooks" it will roll out the wheel opening lip, or any trim that is in that area.