Need Help with 66 Dart Wheels and Tires

My son and I are restoring a 66 Dart, 270, 4 door. It has the original 13", 5 x 4 steel wheels. The car has 4 wheel drum brakes and stock suspension.

We would like to update to a 14" or 15" wheel/tire combo. If anyone has experience or recommendations as to what size wheel and tire would work on the car we would greatly appreciate any information you are willing to offer.

Specifically we would like to know what wheel diameter, width and backspacing would work without any modifications to the stock suspension, brakes or wheel wells.

Thanks much
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