The Bachmann On30 cars boxcars are close to the Uintah Railway's "modern" era boxcars. They just need to be lowered. They are 29 Foot long in 55n3.
The Bachmann On30 gondolas and flats can be narrowed a scale foot to represent a typical narrow gauge gondola. An hour is all that it takes to narrow a gondola or a flat car.
The Bachmann On30 stock car has no known prototype except Bachmann's large scale rendition using a standard gauge car. It will suffice.
The Passenger cars match later cars and can be lowered for the earlier era.
The passenger cars go well with our high drivered 4-4-0.
The 12 foot height matches cars from the Waynesburg & Washington and the Ohio River & Western. The body height matches this early "duck-bill" car. So they can be used without modification.
The windows match this Pacific Coast Railway Coach. The cars become 40-1/2 feet in 55n3, a big improvement, the width is 8-1/2 feet to match the plan.
