 The 1970 season saw epic battles between the two teams and the many cars they entered, yet Porsche won every event except Sebring, where the victorious car and its drivers Ignazio Giunti/Nino Vaccarella/Mario Andretti had their origins in Italy.Ferrari decided to give up the 512 in 1971 in order to prepare the new 312PB for the 1972 season, when only 3 litre class would be allowed.In addition to Porsche, the old national rival with its Alfa Romeo T33/3 also had won two races in 1971, and thus was ranked second in the World Championship, above Ferrari.