I had a Marx 1998 switcher missing the Marx shell. I found a Lionel SW2 shell and cut out about 1 inch of the Lionel shell to shorten to fit the 1998. I painted it black, white and red in the colors of ALCOAs Bauxite and Northern short line railroad from the Bauxite, ARK alumina and chemical plant in Bauxite, ARK to the a major railroads main lines. The Marx1998 is a great running engine and I love to run it. My adult daughter loves to run it very fast and always beats other engines in racing through the oval and figure 8 on my layout.
Charlie