Well, now that I have seen before.
By the time that was built, Alco was in big decline, railroads had pretty much settled on EMD and GE. Railroads don't like to experiment with unknown stuff, no matter how good it might be. Fairbanks-Morse powered a lot of submarines and other ships in WWII - by this time, they were gone as a loco builder. Too different.
A more modern example might be the MK5000, Morrison-Knudsen was well known as a locomotive rebuilder, but when they took the next step and built their own loco, with a proven Cat prime mover - not much interest.
--Randy