driving for NART. Three 330 GTO specials were made using the 250 GTO chassis and body fitted with 400 Superamerica 4.0-liter motors. Distinguished by a larger bonnet bulge, these cars were used briefly for racing and testing by Scuderia Ferrari before being sold to private customers. Some sources include these cars in the total number of 250 GTOs produced, increasing that number from 36 to 39. The 330 LMB is sometimes considered a GTO variant. These cars used a 4.0-liter 330 motor and a modified 250 GT Lusso chassis/body. Four were produced in 1963. Three 275 GTB/C Speciales were built in 1964/65. Despite their origins as competition versions of the 275 GTB, they are sometimes considered developments of the 250 GTO due to similarity of configuration and bodywork. The Ferrari 250 GT SWB Breadvan was a one-off racing car designed for Scuderia Serenissima by Bizzarrini after his departure from Ferrari. It was developed specifically to compete against the then-new 250 GTO. Although based on the earlier 250 GT SWB, the Breadvan provided an opportunity for Bizzarrini to develop the ideas he had first explored with the GTO, such as lower and more aerodynamic bodywork, incorporation of a dry sump, and radical lightening of the entire car. Racing The 250 GTO's racing debut was at the 1962 12 Hours of Sebring, driven by American Phil Hill (the Formula One World Driving Champion at the time) and Belgian Olivier Gendebien. Although originally annoyed that they were driving a GT-class car instead of one of the full-race 250 Testa Rossas competing in the prototype class, the experienced pair impressed themselves (and everyone else) by finishing second overall behind the Testa Rossa of Bonnier and Scarfiotti. Ferrari would go on to win the over 2000cc class of the FIA's International Championship for GT Manufacturers in 1962, 1963, and 1964, the 250 GTO being raced in each of those years. 250 GTOs also won the 1963 and 1964 Tour de France Automobile, marking Ferrari's nine year dominance of that race. During the 1962-1964 racing seasons, only a few other GT-class models were consistently competitive with the 250 GTO. These were the Jaguar E-type, Aston Martin DB4 GT Zagato, DP212, DP214, and DP215, and the AC Cobras. In addition to official Scuderia Ferrari entries, many 250 GTOs were also raced by independent racing teams and private drivers. During this time it was therefore common for 250