Stephen, Do not get a new chassis for those old C cell battery R/C 4-6-0s. The chassis for sale is not compatible with it. Get a more modern 4-6-0 use my chassis ID method to insure you are buying a Version 5 chassis. Any version 5 chassis is OK. If you are buying on Ebay be sure there is a photo of the bottom of the chassis and the ID description fits.
Here is a link:
https://www.bachmanntrains.com/home-usa/board/index.php/topic,37791.0.htm
Here is a link:
https://www.bachmanntrains.com/home-usa/board/index.php/topic,37791.0.htm