[ASOC]

Nope, the DC 6, which looks similar, was made into an airliner.

The C-74 was canceled after only 14 were made, but did participate in Operation Vittles, the Berlin Airlift hauling stuff from the US to Europe - so it does have a little piece of (mostly forgotten) history.

From elsewhere on the web

The C-74 supported the Berlin Airlift by flying cargo from the U.S. to staging bases in Europe, from which it was flown to Berlin in smaller C-47 Skytrain and C-54 (Note AKA DC6) Skymaster aircraft.

Experience with the Berlin Airlift demonstrated that the new United States Air Force needed a heavy strategic airlift capability. The fifth C-74 built was modified to be a prototype for the C-124 Globemaster II, which used the same wing and empennage as the C-74, but used a much larger fuselage.

This newer aircraft quickly superseded the C-74 in service. All of the surviving C-74s were scrapped in the 1960s and 1970s.

[Eric in the Ozarks]

One of my first airplane rides was on a United DC-6C. I remember the look of this airplane. Perhaps I'm mixed up a bit but didn't NW have another big 4 motor other than the DC-6 ?