High gears?

Hey guys, this is not really an A body question, but figured maybe some of you mopar gurus might have some insight. My non A body car, a 68 charger, has a 8.75 rear. I recently started going through the car to see exactly what I had. Jacked up the rear and turned the wheels and it's definitely an open case, but the odd thing is the gears...1:1 ratio! One rotation of the tire is exactly one turn of the pinion. I know it used to be a circle track car, but that's about all I know about the car. Has anyone ever heard of such high gears? Because I have not!