That's the ticket. It was one of three engines entered by Ferrari in F1 races that year. They started the year with the V6 used in 1061, and also fielded a V8.
Due to problems concerning the 250 LM's homologation Ferrari had lost their license and they were forced to debut the '1512' under Luigi Chinetti's North American Racing Team (NART) flag in the Watkins Glen Grand Prix late in the 1964 season. Livered in blue and white the new racers were on the pace in qualifying where Lorenzo Bandini recorded the third time. An engine failure forced the talented Italian to retire in the race. Three weeks later he took to the track again in the first 1512 and finished third in the Mexican Grand Prix closely trailing Graham Hill.