Pretty sure the 3.2 motor was getting a 2.65 at that point. It used to be stamped on the housing. Of course if you're willing to get dirty you can also mark the tire, rotate the drive shaft and count. I've never heard of a 2.47 but the V8s were getting a 2.24 I think, which would get nice mileage if you're willing to live with the compromises.