Hey, I am working on a 1970 Buick Lesabre. I would like to replace the speedometer cable and heater core. Whats the issue? I am a little new to working on classic Buicks and embarrassingly enough I dont know how to remove the instrument cluster and am too nervous to start picking at it as I dont want to break anything. And if I could get hints on replacing the heater core that would be useful as well. I want to learn, I just need pointers. Also the fuel gauge has never left E since I bought the car. It has a 25 gallon tank and have been told it doesn't use a float so how would I repair the fuel gauge so I can read my fuel levels like normal again? Those are the 3 main issues with the car.