sentences:  His win allowed Unser to close up to 270 points behind Mears, with Johnny Rutherford rising to third in points, Gordon Johncock falling to fourth, and Al Unser remaining in fifth.Apart from Mears, all other drivers were mathematically eliminated from the championship.Bobby Unser claimed the pole, his fourth of the season, with Rick Mears starting second, Gordon Johncock starting third, Johnny Rutherford starting fourth, and Al Unser rounding out the top five.