sentences:  The 1000 km race was held for cars complying with the provisions of Australian Group 3A Touring Car regulations  with the field divided into three engine capacity divisions.It was the Round 2 of both the 1991 Australian Endurance Championship and the 1991 Australian Manufacturers' Championship.Nissan driver Mark Skaife became the first driver since Peter Brock in 1983 to claim provisional pole position, pole position after the Top 10 runoff (with a then fastest touring car lap time of 2