How do you change steering coupling for 1966 skylark?

To change the steering coupling on a 1966 Buick Skylark, start by safely lifting the vehicle and securing it on jack stands. Disconnect the battery, then remove the steering column cover and any necessary components to access the steering coupling. Unbolt the old coupling from the steering box and the column, then install the new coupling in reverse order, ensuring it is properly aligned and secured. Finally, reconnect the battery and test the steering for proper function.