Question: Which Italian-born racing driver won the road racing finale?
Context: Walter Edwin Hansgen (October 28, 1919 in Westfield, New Jersey – April 7, 1966 in Orléans, France) was a racecar driver from the United States.  His racing career began as a road racing driver.  He was aged forty-one at the time of his Grand Prix debut and forty-six when he died, several days after crashing during testing for the 1966 24 Hours of Le Mans. Alberto "Johnny" Cecotto (born January 25, 1956) is a Venezuelan former Grand Prix motorcycle racer and auto racer.  He rose to prominence as a teenage prodigy in 1975 when he became the youngest motorcycle road racing world champion at the age of 19.  Despite the auspicious beginning to his motorcycle racing career, he suffered numerous injuries and mechanical problems which curtailed his success in motorcycle Grand Prix racing.  At the age of 24, Cecotto turned his attention to auto racing where he reached the pinnacle of the sport as a Formula One driver.  He later became a successful Touring Car racer.  He is the last of a select group of competitors who competed at the highest level in motorcycle and auto racing which, includes John Surtees and Mike Hailwood among others. Carl Renezeder (born April 16, 1964) is an American off-road racer for Team Renezeder Racing.  As of the end of the 2016 season, Renezeder has won 121 short course national events he has competed in Lucas Oil Off Road Racing (LOORR), Championship Off-Road Racing (CORR), and World Series of Off Road Racing (WSORR).  He has won nine short course off-road racing championships.  Renezeder was also the first driver in short-course off-road racing history to win championships in both two wheel drive and four wheel drive trophy trucks in the same season when he won the 2009 Unlimited 2 and Unlimited 4 divisions in LOORRS. John Francis Harvey (born 21 February 1938 in Sydney, New South Wales) is a retired Australian racing driver.  He was a top Speedcar driver for many years in the 1950s and 1960s, winning many championship races including the NSW Championship for three successive years and the Victorian Championship twice before turning his skills to road racing where he had a long and successful career until his retirement at the end of 1988. Luke Pinder is a 33-year-old British racing driver competing in the 2017 ginetta gt5 challenge from Shipley, West Yorkshire.  Pinder has won an array of championships and has had notable achievements throughout his rallying and racing career which include 4th overall in Clio Cup Race Championship,Clio Cup Road Series Champion,Pirelli Star Driver Finalist,BRC R1 Champion,Swift Cup champion ,BRC Stars 1400 Champion and Peugeot 206 1400 Challenge champion.Luke has been involved with motorsports since the age of 13 having started competing in Autograss and moving to rallying and the circuit racing,Lukes ambitions are to progress up the racing ladder as far as he possibly can and as a rally champion turned racing driver uses his unique driving style that always makes every race he is competing in extremely exiting and interesting to say the least. Lime Rock Park is a natural-terrain motorsport road racing venue located in Lakeville, Connecticut, United States, a hamlet in the town of Salisbury, in the state's northwest corner.  Built in 1956, it is the nation's oldest continuously operating road racing venue.  The track is owned by Skip Barber, a former race car driver who started the Skip Barber Racing School in 1975.  It was listed on the National Register of Historic Places in 2009. Ben Keating (Born August 18, 1971) is an American racing driver and business owner operating out of Tomball, Texas.  Keating is the owner of Viper Exchange Racing, and since starting in 2006 he has competed in a number of North American endurance racing, road racing and Dodge Viper specific series, winning multiple championships.  In addition to his racing endeavors, Keating is also the owner of 10 car dealerships across Texas, including the Port Lavaca Auto Group, and The Viper Exchange, a Viper specialty dealership.  In 2015, Keating paired with legendary car designer Henrik Fisker to develop a high-performance sports car, the Force 1 V10, which debuted at the 2016 Detroit Auto Show. The sixth year of IROC competition took place in 1978 and 1979.  The format changed from IROC V in that three qualifying races were held for participants from NASCAR, USAC Champ Car, and Road Racing (which primarily consisted of Formula One, SCCA, and IMSA).  The top four finishers in these qualifying races then earned the chance to race in the two final races at Riverside International Raceway and Atlanta Motor Speedway.  IROC VI used the Chevrolet Camaro in all races.  Mario Andretti won the road racing finale en route to the championship, and took home $75,000 for his efforts. Mario Gabriele Andretti (born February 28, 1940) is an Italian-born American former racing driver, one of the most successful Americans in the history of the sport.  He is one of only two drivers to have won races in Formula One, IndyCar, World Sportscar Championship and NASCAR (the other being Dan Gurney).  He also won races in midget cars, and sprint cars. Fina Román (born May 16, 1965 in Almería) is a Spanish off road racing codriver and navigator.  She is married with the off road racing driver Josep María Serviá, who is the main reason why she started to compete, since he was attendant to the Dakar Rally in the 90s.  Román started in the Schlesser Team, participating in assistance vehicles.  Besides an assistant, she has also competed in car and trucks categories.  Then, she moved in 2006 to official competition, as a navigator in the KH7-Epsilon Team, in the 6x6 trucks category, together with driver Jordi Juvanteny and co-driver José Luis Criado.
Answer: Mario Andretti