All those stories about Cubans keeping ancient American cars on the road are absolutely true. It is out of necessity: Trade embargoes prevent both U.S. cars and parts from making their way to the island, and the foreign cars that are available — both new and used — are well out of reach financially for all but the most affluent Cubans. Because of this, they are the ultimate vehicular scavengers, fabricators and mechanics.On a trip to Havana in January 2018, our guide for the week was an affable woman who drove a gorgeously appointed 1950s Chevrolet. One evening on our way …