An N-Scale Athearn UP Big Boy is Approximatly 9.9625 in. coupler to coupler.
I am kit bashing two walthers brick diesel engine houses to make the UP steam shop but I dont own a Athearn Big Boy yet and who knows when the new realease will be out. I would like to know how long one is from coupler to coupler and how high it is so I can build the structure and get the foundation in place before mine shows up.