MGB Steering lock/ignition . This is a Lucas complete steering lock assembly (keys, switch and lock assembly) for a MGB 1970 to 1974 and MG Midget 1970 to 1974. Cheap knockoff Steering lock assemblies are not worth the hassle of dealing with. After all the time it takes to remove the old switch on your MGB, you should replace it with a quality Lock Assembly that will work smoothly and consistently.