How do you get the battery out of an 1984 Olds Omega?

Disconnect the negative ground cable, then the positive cable. There is a center bolt holding the cables in place. Remove the battery hold down clamp which is located in front of the battery. You will probably need an rachet with an extention to get down to the hold down clamp which is between the battery and the front of the battery bracket. It may be necessary to remove the cross piece that runs across the top of the battery in order to remove it from the car. Hope this helps.