I am ordering some new Centerline Telstars for my 67 today. I am planning to buy a pair of 15X8's with 4.5" backspacing and a pair of 15X7's with 4" backspacing. I plan to run 255/60's on the rear and 225/60's on the front. My car is pretty low and I plan for it to get even lower so I want to make sure the tires are tucked in good enough to not rub on the wheelwell lip. I can get the fronts with 4.5" backspacing also and I am tempted to go that route--would 4.5" be too much? Thanks for the help.