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I have researched the box code part of my question, IE
915 = 915 box
61 = 911 SC (ROW)
12 = LSD
718 = 1978
5747 = sequential box serial number
The big problem is that this should be an electric speedo box, but the speedo hole is plugged. The plug appears internal?? and not a simple frost plug type that I can easily pop. See pic:
I need an electric speedo output - any ideas or suggestions?
Robert
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