Climax Challenge

[J3a-614]

Union Freight Railroad of Boston had several of these. . .looks like Bachmann's three-truck Climax would be a good starting point.

http://www.precisionlocomotivecastings.com/graphics/Climax_1646.jpg

http://gearedsteam.com/climax/images/union_freight_rr_8.jpg

Where they ran:

https://sites.google.com/site/newenglandshortlines/home/page-1/page-2/page-3

https://en.wikipedia.org/wiki/Union_Freight_Railroad  (includes roster)