Reply to "Mixing steam locomotives with streamlined passenger cars?"

There is almost no combination of locos and cars that you can put together, from that era, that wouldn't be prototypical. Diesels pulled heavyweights. Streamlined cars and heavyweights could be found in the same train. Although mixed types were usually found on secondary trains. Some heavyweights got modernized and were used on the top streamlined trains of some roads.