[Joe Bob]

Larger wheels and tires in the rear and smaller in front was a design decision by Porsche to control oversteer of earlier cars....swb with weights in the bumpers to the later, longer wheel base. The stagger was a good idea.

Using the same size tires and wheels defeats that premise. But, it's YOUR car.....do what you want.....

9s on the rear are a waste as the 245 is about you can fit on an SC. 9s tend to be more expensive than 8s. SCs came with 6s and 7s from the factory.