I met an old Irish chap who actually was a pax in a C-74 Globemaster. He had been in the Irish army in the early 1950s and they had a United Nations task in Cyprus. As there were no suitable charter aircraft in Ireland the USAF supplied a Globemaster from Dublin to Nicosia. It seems not much use was actually made of them. The powerplants were the same as in the Boeing Stratocruiser, just too complex for reliability.