It sure is custom, alright: ...

[J. S. Bach]

...I like scale GG1s, but:
https://www.ebay.com/itm/Custom-O-Gauge ... 3576916659

[ScaleCraft]

Close inspection of the lousy Trainz photos show stock Lionel GG1 drives. Wonder if they whacked two shells and spliced them to do that?

The next question is, did they make a REAL short one from the leftover bits?

[J. S. Bach]

It looks like a Williams scale-length shell. The strips are too good and the lettering is nice and crisp. If my Williams were here, I would compare, but they are temporarily in Baltimore.

[ScaleCraft]

Makes no sense. But then, a lot of evilbait doesn't.

Why gut a Williams, then try to find short Lionel drives, to make the whole thing look....stupid?

If you had the Lionel drives, find a Lionel shell, right?

[rogruth]

But it's one of a kind !