You can even go to 15x8 on the rear with no problem. Couldn't find a better pic right now but here's a pic of my old '68. It has 14x7s on the front, though.
Dallas

68 B'cuda (Small).JPG
2012 Rallye Redline Challenger, 1st new car!
2010 Ram 1500 4wd HEMI-hauler
2014 Dodge Dart-gas saver
4 projects and a bunch of parts cars, losing interest since buying the Challenger lol
1969 Dodge Coronet 500-'gonna fix 'er up someday!'