Biggest Rear tire setup on stock 68 dart 14" wheel

I was almost positive that to run a 275/60 out back on a Dart you would need to relocate the springs inward... but at any rate, I agree with others posting here. 245/60 is the biggest your gonna get in a 14 inch wheel... I run 235/60's on the back of my Dart currently and have also run 245's before... I intend to upgrade to 255/60's on a 15 inch wheel out back