Widest width Tire, Front/Rear on '65 Dart

I'm running 215/65-15 on 15x6 in the front, and 245/60-15 on 15x7 in the rear. All wheels are Wheel Vintique 63's. The fronts don't rub unless doing really aggressive cornering into an uphill driveway. The rears have more than a finger width between both the spring and fender lip and don't touch at all.

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I love that tall front tire. Do you recall what backspace that front wheel has?