Here's the stupid question of the day.......wait for it...

I have a km/h speedo. Can I make it into a mp/h speedo by some cool trick? ie then the reading it gives would be in miles instead of km. I thought maybe, just maybe there's a little pin or adjustment or something inside that I could change to make it read in mph.

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1983 240D Silver/Blue "Sadie", unknown miles. 100k miles on WVO single tank, converted to 2 tank about 10k miles ago, FPHE, Injector Heaters, Aux Fuel pump. Alcohol/Water injection. Frantz oil bypass filter
1992 300D 2.5 Turbo Green/Tan "Jade" 267K miles Stock.
1992 300D 2.5 tan/tan "Rocky" on 2 tank WVO. Pressure actuated Turbo "rat's nest" surgery completed. 197k miles