guess the LOCO game...

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What is this loco?
 
This is crazy, at least from sources, I know that those Sd90Mac's were classified by Union Pacific before they retired them to be Sd90Ac's because the Sd90's that still have the Sd70Ace/M-2 cabs probally still have 6000hp, and the ones with the normal wide cabs were derated to 4300hp (Sd90/43Mac).
 
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