Rear tires for 65 Dart

I just got some 15x8 rims for the rear on my 65 Dart. What’s tire fits without any cutting? I have 14x7 for the front and I’m planning on going with 225/60.
Thanks!
Yep they might be too wide. I put 15X7's with a 4" backspace and a 225-70 and not a lot of extra space. New 15" rear tires