Iberville S1
Very vaguely based on profiles drawn by Joshua Moldover, via The Railroad Paint Shop and yours truly @ my dining room table
The ILW SX51-A410, a 1000 HP switcher remanufactured from an Alco switcher – in this case a S-1 – with a standard engine compartment wedged between the existing cab & radiator shell (the radiators are replaced with newer and smaller ones, but the fan & metal shell remain), often with a air conditioner unit built into the roof.