I've had this idea of building a Boeing C-141 as if it had won the competition. I had found that the C-135 was almost the same size as the Lockheed C-141A so my thoughts were to put the C-135 wings up on top of the C-135 fuselage, giving it anhedral and then using the type of engine nacelles the Lockheed C-141 had.
A week or so ago in a thread on the What-If forum I had laid out the idea there too, and low and behold this morning, on SPF, there's a thread there all about it. It's not far off what I had envisioned, the only thing I would have got totally wrong was the main undercarriage arrangement. Now I have something to work on --- (it would also suggest some arrangement for Boeing's XC-5 proposal)