Speedo Ratio?
 

I ordered all new autometer guages for my car,(ultra-lite speedo, tach, oil press., water temp., volts, and fuel level). The speedo I ordered says it runs on a 1 to 1 ratio and it may require changing the gear on the end of the speedo cable. Does a factory cable and gear run on this ratio? It didnt tell if what gear I would need if I have to change it. Does anyone know? Thanks for the help.

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