I just noticed anoter post about puting a 68 rear end in a 66 coupe. The post said that there would be clearance problems and tire/rim limitations. I have access to a 67 8" and was told that it is a direct bolt-up and that aside from the larger brake drums and the 1" width difference that it will pose no problems. Is there a big difference between the 67 and the 68? Or am I possibly missing something else? I don't want to go through the hassle of going through the 67 8" if it is going to be a headache to find wheels and tires, or during installation.