14 inch with 4inch backspacing, 8 inch rims.
245/60/14 tires.
I think they are called American Racing Outlaw II.
I kinda felt on a 63 Galaxie, they looked small and very 70's ish. If I ever find a Falcon or Mustang for my boy, I'd probably use them, but I just didn't like them on my car:

One of the treads bulged on the tires and I really wanted steel wheels, so I pulled them off. They aren't show car quality.
I wanted the look I currently have:

I can say, those previous tires are hard as a rock and I'd spin them way too easy. The new tires are Mickey Thompson s/t and they are awesome, I'd recommend them to anyone for a street car, they do well in the rain and all too.