Ahem Choo Choo Charlie... those Santa Fe "Covered Wagons" are F7 and NOT e7's.
E7's have 6 wheeled trucks and Rectangular windows on the side car body...
your F7 Santa fe's have 4 wheeled trucks and round windows on the side car body. And I don't hink Santa Fe had E7's to begin with... Just EMD E8's.