Rear tire width max for 67 Barracuda

They come up here used all the time, I think I paid 800 for 4 wheeels with like new tires in amall bolt pattern, I didnt hesitate because there getting hard to find. 255/60/15 on 8 inch wheel fits no problem, Ive looked at mine and I think a 265 will fit but 275 is definatly to close for comfort. good luck.