There's no verification that those engines are definitely from the DK - several knowledgeable people believe so, and some others mechanically inclined believe they aren't. Many of the DK parts have already been placed on the DQ, like the paddlewheel shaft in '80 and the notorious section of the starboard engine in '54 here in Rock Island after she ran through herself. So you're not looking at a complete set even if it is the authentic twin. Perhaps Chief Dennis can chime in here....