Elvas Tower: Union Pacific A-50-4 Auto Boxcar Drawings - Elvas Tower

A handful of mechanical drawings that were reproduced in Railway Age Gazette in 1919... should be enough information to make a 3d model.

Pages are reproduced here about 4X larger than the originals -- THAT"S VERY LARGE -- because many of the dimensions in the original size were hard to read. I suggest you re-sample copies of the images to some lower size for practical use and retain the originals only as a "safety net" while making any models.