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Registered
Join Date: Jul 2015
Location: Jacksonville, Fl
Posts: 1,260
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I did this in my 1975 car. I simply purchased an auto meter GPS sensor, and plugged it into an electronic Speedometer for my 911. It gives me really accurate speed, and works perfect.
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Chris - Insta @chrisjbolton
1975 911s Insta: @911ratrod steel wide body, 3.6 conversion
1989 911 Carrera 25th Anniversary Ed (5th from the last car to ever leave the original Porsche factory assembly line)
2001 996 Turbo - ~54k miles
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