MPH vs KPH Speedos

This morning one of my Facebook friends mentioned someone doing a miles to kilometer conversion.  (Don't worry Cory, I won't tell who that was.)  And it dawned on me that my nice NOS speedo is a KPH unit and, therefore, has an odometer or two that read in clicks.  Given that, my plan of sticking an MPH faceplate on it and using it in Dad's truck isn't going to work very well.

In the pics below, the left one is an MPH speedo and the right is a KPH unit.  You can see that the gears to the odometer are different sizes, and that's true of the trip odometer gears as well.  

Gary,

That's interesting. The face swap would work no problem...obviously the speedometers are the same, but the odometers does present a snag. You'd be racking up the miles much quicker. I guess if you were using your odometer to track your MPG, it would be great! lol.

PS: My old man, still to this day uses UK Gallons in his MPG calculations (which he watches like a hawk). Since we discuss it regularly, I have to know the three different units of measure.

1. Miles per US gallon (which most of North America uses)
2. Miles per UK gallon (which my old man uses)
3. L/100K which is what most Canadians (Under about 40) use. L/100K is becoming much more common for all ages these days due to the fact that most cars display it automatically (Canadian models, at least).

So what are you doing with the metric speedo? If by chance it is one of the later metric speedos with the 6-digit odometer, and if by chance you were going to get rid of it, let me know. I have only been casually looking, and that is with the assumption that the odometer can be altered, and a new instrument cluster lens is available (I don't know if either of these are true).

Yeah, I track my MPG and doing it in clicks ain't gonna happen.  I did the L/100K while we were in the UK, and at the time acquired some feeling for what was good or not.  Have long since lost that.  So I want my odo's in miles.

As for the NOS speedo, here's what it looks like with its input at 1150 RPM, which my calcs say should show 69 MPH.  I'm not going to use it so shoot me an offer via email if it is what you are looking for.  But, there's no hurry as it will go back in the attic in its padded box otherwise.