I just realized this is a standard cab flared radiator '70M. What did you bash that from?
It's the stock Athearn. It's actually incorrect for the prototype but I didn't realize until after I bought the model. IIRC Kato had the correct cab, tho I'm not sure about their radiator. Oh, well.....

The stanchions are the GMM. I use the longer ones, then trim them flush after soldering the handrail into place. The safety chain is JnJ. Not indestructible, but they do stand up to the occasional errant thumb.
The one thing that still bugs me with the Athearns is the "coke bottle glasses" look of the windshields (and the cast-on wiper blades).