Thanks guys.
Tim, I'm looking at an adapter, I just don't know what ratio I need for the speedometer. Did I miss your link to the instructions?
I don't have a working speedometer right now.
I bought a matching set speedometer gear and pinion and installed it in the SM420. When I took the truck on it's maiden run, I saw the speedometer peg out at top speed and I was only going about 30 mph. It twisted off the speedometer cable. I just figured I have a seriously wrong ratio.
Maybe the cable was faulty?
Jerry
