1973 scamp front tire size.

4.5 bolt pattern. I don't really need or want to go bigger. I would prefer to have the tire height at 24-25 inches, no more. The rear tires are 255/60-15 , the rear is narrowed, not tubbed and leafs are moved in 1/2 inch. So, In a perfect world, I would have a tire fit like this one, diameter and position relative to the fender but on a 15x7 inch rim. What BS and tire size would give me that combination?