hey guys I'm in need of some help! I recently picked up an 83 hurst olds I'm trying to square a few problems away. It runs a bit rough and the battery is not charging. Even after a full charge on the battery the volt gauge in the dash never works. Is there something I should check before replacing the alternator? I know with my GN if the bulb goes on the battery indicator it won't charge and was wondering if this had a similar setup?