Motive power for Kato passenger cars?

Electro-Motive E-units would be the best choice. UP had loads of them.

Alco PA's, though not too numerous on Union Pacific, also pulled some of their passenger trains.

UP acquired 3 A-A sets of E-6's in 1940, which were traded in to EMD in 1956 and rebuilt as E-9's. According to a Kato listing, their UP cars include the following for which I have builder data readily available: Baggage UP # 5671 - ACF in 1957 Sleepers American Eagle & American Beauty - ACF in 1942 Coaches UP # 5421 & 5442 - P-S in 1950 Domes UP #7000 & 7007 - ACF in 1955 So except for the baggage car, you could justify running E-6's with the other Kato UP cars and call it late 1955 or early 1956. Have fun, and do what looks good to you. Gary Q

One more for you is the Kato obs, UP # 1575. This car was built by P-S in

1937 for the City of Los Angeles train set powered by the unusual round nosed A-B-B set of EMD E-2's designated LA 1-2-3 . It was originally designated as "Sun Valley", but was re-designated as "1575" in 1955, further supporting possible operation circa '55-'56 behind E-6's. Gary Q

I found a picture on the UP archive site of an E6 ABB pulling these cars, and it looks really neat. Thanks, again.