I have a older UP 4-8-4 and as some of you know the pancake motor was re powered with a can motor. I really would like to keep the shell and replace the Chassis w/Motor (Niagara). Does anyone know if my old UP shell would fit the new chassis. Looking at the pic it appears it would but I really not looking to buy it unless I was sure. This of course is a Bachmann loco.

I am in need of a motor for the 2 truck climax. Went on the site and bachmann does not show the motor in there parts for sale. Any help would be appreciated.