Yeah, this is their reasoning:
These moved on dedicated freight trains with expedited schedules, covering the 900 miles between New York and Chicago in as little as 32 hours.
With all-new tooling to capture the look of the prototypes, the WalthersProto X29b features the correct larger body, 7' Youngstown doors, a diagonal panel roof and 4/3/1 Dreadnaught ends, and come finished in the early silver scheme with the circle Keystone.
Although I’m not a Pennsy expert, I haven’t heard of such trains. I’ll take the word of those of you more informed. I also have no need for a caboose, of course.
Modeling the New Haven Railroad 1946-1954