I have 15x7s (off of '87-'88 Monte SS) and run 195x60x15s on the front (225x60s on the back), and the fronts rub..... but only while tuning, and going over a bump, like pulling into a driveway.
I live with it.
On my 66.
Steel Wheels 15x7 with 4.5" backspace. Unique wheels, they had to come out of a warehouse in Ca. because of the backspace. (Look for a P at the end of the Unique part number, that is the deep backspace wheels)
New Tires, BF Goodrich Radial TA
Front 205 60 15 A little rub, but minor body work cleared it.
Rear 235 60 15 Wide as it gets with the stock rear on my car. A little work on the lip to keep it from rubbing in hard corners.