The problem lies here: The driver's head actually sits BEHIND the leading edge of the rear wheel. In most cars, the rear suspension "pushes" forward on the chassis through a straight bulkhead. This makes it very easy to design the chassis. You simply connect the rear suspension to the rockers at a 90 degree angle and that's it. The wheelbase is extremely short in an original car--only 90 inches. This leaves very little room for the chassis (and makes the driver actually lean OVER the rear tire). I bet you all didn't realize how close that tire really is!