Rims - 69 Dart

Hey everyone. Have a stock Dart with 14" rims and want to change the tires and rims. Have Cragars and want to keep the look it currently has ...Found a set of used 15 x7 and 15 x 8 Cragers with 4" back spacing .....Can anyone suggest what the size of rim that works best on a stock 69 Dart Swinger ....Thanks