An exceedingly rare 1960 Ferrari 246S Sport Dino Fantuzzi racecar could fetch as much as $6 million on May 18, when Ferrari hosts the second annual Leggenda e Passione classic car auction at its headquarters in Maranello, Italy. The racer, one of only three built, was damaged in a pit-lane fire during a race at Germany’s Nürburgring track in 1960 and was restored with the original engine 37 years later. It last raced in July 2007 at the Copenhagen Historic Grand Prix. The word Dino in the car’s name refers to the vehicle’s engine, named after Enzo Ferrari’s son, who was instrumental in developing it before his death from muscular dystrophy in 1956, at age 24. The auction of classic Ferraris and Maseratis, conducted by RM Auctions (www.rmauctions.com) in collaboration with Sotheby’s, also will feature a 1961 Ferrari 250 GT SWB California Spyder that was owned by actor James Coburn in the 1960s. The short-wheelbase street car/racer, the 13th of 54 built, is expected to sell for more than $5 million. A prototype of the Ferrari Pinin, a four-door vehicle that never entered production, will go on the block as well. . . .