Well I ordered the Mangusta speedometer cable form Wilkinson Pantera and tried to install it. The original cable routes through one of the square tunnels under the car. The cable from Wilkinson was the correct type but about a foot and a half too short. I had to route it under the car where the stock parking brake cable goes and zip tie it so it does not hang and make a shorter route around the steering rack direct into the speedometer. It works for now and the needle does not bounce at all. I have sent the original part to Wilkinson to reproduce to the correct length.
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