Jegs Wheel and Tire Kit...

Ok. So the higher the number the more the tire sits in towards the middle of the car correct? So your wide tires dont stick out so much? But if you go in to far you run the risk of hitting the leaf spring?

Yupp, but don't forget to take into account the width of the wheel. A wider wheel with the same backspacing as a narrower wheel will sit the same distance from the suspension but the wider wheel will also occupy more space towards the fenders/quarters.