I run 275/60/15s with a 15x8 wheel on my 68 Dart w/ the springs moved in 1/2". You have to nail the backspacing dead nuts to run that size tire on a Dart. I believe the backspacing on mine is 4.75".
Thank you very much for the reply it is on a a body housing I'm moving over 1/2 inch just like yours thanks you wouldn't happen to have a picture of that bad boy would you
