We'll I know it's a green '70.. and it does not just pop off.. look on the back side of the steering wheel and remove two horn pad screws. You'll probably want to unhook the battery, if the horn works. A steering wheel puller comes to mind since most '70 steering wheels are very delicate and mostly always cracked, remove, check to see if steering shaft centering mark is at top, relocate steering wheel as needed. If centering mark is not indexed properly another problem is afloat. Centering mark on shaft should be at top when tires are facing straight..