Hey, Popcorn, I went through the exact same problem with my '59 Apache. One thing I learned is that later model speedo gearboxes are very, very similar. The only real difference is that in some of the later speedos the drive cable doesn't screw on, it snaps on with a retainer on the gearbox. They still work. I got several from e-bay just in case - they're cheap. My odometer tumblers are from a '79 Corvette - works fine.
