Tire size recommendations needed

KnuckleDuster, Do you think I could get away with 225/60/14 for fronts and 275/60/14 on rear of my 68 dart? would it be too close on the rear. I am running ss springs on the rear with coil over shocks. I want the widest stance on the rear as I can possibly get. Really mean looking stance is what I am after BTW, that Duster is awesome looking, about the same color of my car would like to see more photos of yours. PM me if you want to talk more about the cars.

I have 225/70/14 on the front, and they rub a fender bolt on the passenger side only. I plan to maybe get 225/60/14 but have to look at the height and width difference first.

Not sure about the 275's on a Dart, but I doubt it. 255 might be as big as you can go. Dusters have more room to the fender lip. Backspace also plays a big role.