Do you have to remove the dash to replace the speedometer cable in a 1972 nova?
No, you just have to have a small hand to get in back of the speedometer.
You have to drop the trans pan to do it. Remove the cable from the carb and bracket. There is one bolt where the cable runs into the trans. Remove that bolt. After dropping the pan you'll see how the cable is mounted inside the trans. Remove the retaining clip and pull the cable out. Reverse for installation.