Yes, I also experienced an engine failure on a C-47 Dakota with 3 tonnes of newspapers and mail on board, but it happened at F/L 70. Hence no need to climb during the diversion. Had the ILS approach through low stratus led to a go-around, however, we fully expected it to be successful.
Eric, you do not need to convince me that the certification requirements for single-engine performance on twins have risen enormously since the DC-3 was certificated in the 1930s, and again since the Convair 340 in the early 1950s. I fully agree that those inexperienced on such older types need to be made aware of that. But there is no need to exaggerate to make the point. You wrote that, in the DC-3/C-47, "Trying to climb engine-out will quickly put you below Vmc unless you are empty."