Help Carl H

[WOOTEN]

I have a 1990 S13 Silvia with the factory KPH gauge cluster and I would really like the Speedo to read in mph on the kph gauge face. All of my searching lead me to this individual and I am not aloud to PM yet so Im putting it on here. I know this can be done, I just have know idea of what resistor to change and no diagram to even begin to figure it out.

Thanks for your time,
WOOTEN

PS: I do realize that I am not posting in the 240SX section, and that is because I my searching lead me to "Carl H" and as of now I cant PM him.