65 Valiant wheels

Does anyone know what size wheels and tires will fit a '65 Valiant in the rear with a spring relocation. I will be opening up the wheel wells as needed. And what will fit in the front. I'm keeping the 5on4 lug pattern and I am converting to K-H disk brakes in the front. I am going to go with 15" wheels. Tire diameter and wheel width and back spacing info would be great.

Thanks
Jason