Tire Size For a 1974 Plymouth Scamp

Hello Mopar Commuinty
I have a question that I am concerned about. I recently purchased a 74 Scamp with Mopar Rally Wheels. I noticed that the rear tires are really nice looking but seem to rub on the inside and the outside of the tire and wheel well.
My question is what size can I go with to get that same wide tire look without losing the look. the tires are 255 60 R15 BF GOODRICH.

Or does any one know of a way to keep tires on without rubbing aginst the wheel well.
All suggestions welcome.

Thank you for your time
vanleer mopars
Try going to a 245/50/r15 or Roll the lips on the quarters and clearance the inner fenderwells with a 5 lb sledge if you like that tire size.