[camarojoe]

Yes, all 970 model tachometers require a sending unit to operate. If it is a pedestal tach, the entire outer chrome bezel is pressed on and has little bumps to hold it to the main case... You will see where the bumps are from the outside, as there are dimples visible on the outside chrome outer ring... sometimes the ring can be pulled off by hand, but usually you'll need to "knock" it off... Use a screwdriver with some tape wrapped around the tip to prevent scratching, and give it a light tap, the whole lense and outer ring should pop off, and the plastic lense can then be removed from the backside...just be careful....

-JB