At the dawn of the civilian jet age, the legendary De Havilland Comet was already on its way out of the public's good graces after going through multiple mid-air breakups. At the same time, in the mid-50s Boeing was setting out to prove that they had what it took to make an passenger jet for US airlines, having already built the B-47 and B-52 for the Air Force. When the airlines weren't convinced of the company's ability to pull it off, Boeing took the long way around, building a completed single prototype to present to the heads of Pan Am, TWA, American, and more. Three years and two aileron rolls over Seattle later, that prototype, the 367-80 or "Dash 80", would become the basis for what we now know as the 707 and its military derivatives, including the E-3 and KC-135.
We have a lot of the early jet airliners in the world of YS mods (including the aforementioned DH Comet), but oddly enough, I wasn't able to find a single example of the Dash 80 anywhere. Usually, I wouldn't think a prototype aircraft would need to be made into a mod, but the Dash 80 is quite different: it has a strong historical significance as the starting point of the entire Boeing legacy of airliners.
...Well, that, and it has a pretty nice paint scheme...
I'm not sure what exactly it would take to convert an existing 707 model to be a Dash 80, but by god, it would be great if we could see the OG of Boeing brought back to the skies in YS. I can only hope one of you absolute legends of Blender would think the same!
