The trains were powered by lightweight, shovel-nosed power cars, styled by Otto Kuhler, and equipped with 600 hp (450 kW), six-cylinder AlcoDiesel 531 prime movers and Westinghouse electric transmission components. The units had an uncommon 2-B wheel arrangement, mounted atop a pair of road trucks. The aft section was divided into two separate compartments: one was used to transport baggage and the other served as a small railway post office, or RPO (the forward door, located just behind the radiator louvers, was equipped with a mail hook).
Two of these power cars were purchased as part of the 1935 order, along with three buffet-coach cars, and two sleeper-observation cars. Normal operating procedure was for a northbound train to leave New Orleans with two coaches and an observation car. Due to lower ridership on the northern portion of the route, one of the 2 coaches would be removed from the northbound train at Jackson, Mississippi, and the train would continue on to Jackson, Tennessee as a 3 car consist. The southbound train would add the extra coach during its own stop at Jackson, Mississippi.
The 1937 order included a third power car, and 2 coach-sleepers. This third power car ran from Mobile, to Union, Mississippi with a single coach-sleeper, which was added to the northbound mainline train from New Orleans. It then returned to Mobile with the coach-sleeper from the southbound train.