I picked up an MP 50' boxcar of an unknown origin at a train show.I suspect it might be a Front Range model.The detail is not up to today's standard.Not being familiar with the MP or its rolling stock I am seeking help as I would like to upgrade this model.The car is lettered for the 86200 series.The information I am seeking,if it is not a "Fooby",is:roof type,running boards and truck type.Any help would be appreciated before I plunge into an attempt to upgrade.Armand Premo