That truck was from here in San Diego, and the driver was a local radio DJ. It wasn't a factory effort, but he had the support of some local dealers. In 64 he was back in a car, a Ramcherger.
Funny, not long ago I was flipping though some old issues of Drag News and found an ad for the Ford XL100. I'll see if I can make a copy of it. The ad stated that the truck was available to be ordered, although we all know that never happened.