Not sure if this is the place to ask.. but i will..

I have a US car and im in Canada.. I would like a KM/H Speedo.. Now I have found a gauge cluster with KM in excellent shape.. however the speedo reads up to 220KM or 140MPH .. My car read to 120MPH .. If possible.. i'd lke to just replace the face.. otherwise I'm into problems with the odometer.. Anyway.. If I had to, it would be no prob to just replace the entire cluster.. but wondering how the speedo is affected.. And can you swap odometers without screwing them..? or roll them back to where my original is? mine reads approx 92K Miles.. this one reads 179K KM which 92K Miles is 147K KM.. anyway.. any input is appreciated.

 

better question may be, can I roll my odometer back to read what is supposed to be on the car?