I guess I could try that. I have silver soldered 6-inch copper back in the day. Dual rose bud fitting. I don't know, I am getting frustrated. I refuse to drive the car without the speedo working properly. I want to retain the correct mileage. I bought the car with 54,614 in 2015. It now has 59,800. I might just have to let it go. I'm getting tired. D