Awesome and much needed add-on!
The flaring radiators do not look quite right on this pre-production sample yet.
Compare with this photo:
The
Hustle Muscle, the original top of the horsepower range King of Diesel engines.

Hopefully a high hood, long hood forwards "Hammerhead" Norfolk and Western or Southern unit will be included as well. You won't get a more massive looking engine than this, IMO.

Coming off the "Rathole" division crossing the Tennessee River into Chattanooga, a scene you can actually re-create on SMM's NSAND route.

This fits right in with the default USA route.
Crossing Cajon Pass, a scene we could arrange on Barstow - San Bernardino. Notice the SD45 B-units and the shroud and hoods on the electrical cabinet/filter intakes.

Give me this distinctive looking and universally employed SD45 over that lame SD75 anytime!