I've got 14" rally 2's with 215-70-14's. They look nice and don't rub. There is not a lot of room in the wheelwells on 67/68's. It depends on the suspension setup and the back spacing of the wheels. My friend had 215-65-15's on his 67 bird and they worked fine and looked great. I put that size on on my 67 bird and I had some rubbing when I had a passenger and ran over a speed bump. I moved them over to my GTO and got the 14's for my bird.