91 Caprice/ignition and steering

My poor son is attempting to tear down his steering column to change out a faulty ignition switch. Anyone got a schematic picture breakdown of how the column is put together that you can e-mail us? We don't have a Chiltons handy today and this is a today project. He has a 91 Caprice Classic with the standard 5Ltr/305. Thanks, Steven( [email protected])