Hello I have a F100 1953 with the old flathead V8 and 3 speed, the truck is all stock. I wonder If some one knows what kind of rear end it is, it looks like a little Dana or is it Fords own axle? The question is the easiest way to change ratio, should I find another axle or is this kind of axle mounted in other trucks /cars so I just could change pinion and gear. The engine revs pretty hi on the highway as it is now. Lars.