I need pictures of Darts with 15 x 7 wheels on back!!!!!!

I have been told if you run a 15x7 with a 4.25 inch backspace you can stuff up to a 255-70-R15. I will be running this size on my 74 Dart Swinger.
Also what size and backspace are your front rims? and tires?

My fronts are 15 x 6 with 3 1/2" backspace with 215 65 15 tire.