I have owned three 1st gen Firebirds and 4 GTO's that have had the quarters rolled. When you are a restorer, rolled quarters are a disapointment to put it mildly. To think this is still happening to these 40 year old antique cars is sad to me. I thought that, just maybe, the owners appreciated them enough to not destroy the original sheet metal.
Having said that, in the interest of having fun and putting whopping tires on your cars, go for it! Keep in mind that you can run 12 second quarter mile times without rolling the quarters. At stock ride height and correct backspacing you can run BFG drag radials that are ten inches wide.
Personally Greg, I have seen pictures of your car and it's really nice! I can't picture you beating up your sheet metal without cringing at the thought.