63-66 Dart. How wide of a tire on the back?

I put 225/70-15's on my 66 on 7" wide wheels with 4" backspace. About a 1" clearance both inside and out. I think you could use a 8" wheel with the right offset and just the right tire without rubbing. Most have to trim or roll the fender lip to prevent cutting a tire. tmm

http://www.forabodiesonly.com/mopar/showthread.php?t=241504