Do Corvette 15X8 wheels fit in a 69 Camaro?
What is the backspacing required in a 15X8 or 16X8 wheel? (Wheel Vintiques).
What is the max tire size that will fit in a car with stock suspension?

Usually a 15x8" wheel with 4" backspacing will fit on the rear. Also you should be able to run either a P295/50R15 or a P275/60R15 Tire. Nine outta ten times it'll work. Measure to make sure, sometimes SH!T HAPPENS.

I currently have 15X8 corvette rallies installed on my car. Tires are 255/60. They rub big time. I believe the wheels offset is to great. My recommendation is to try the z28 15x7 wheel.

I've got 15x8 Rally's on the rear of my '69 with 255/60 tires. I believe the backspacing is 4.5" (I'll try to check tonight to make sure). Mine don't rub and have about 1/2" clearance to fenderwell edge. Are you springs old?? Might be sitting too low.