sentences:  After trying the P69, prior to qualifying, Jack Brabham flatly refused to drive the car in anger so unstable did he find it.That left only a year-old P68 to carry the AMR flag, in the hands of Hulme and Gardner.A large, high-mounted wing was attached directly to the tops of the rear suspension towers, which went some way to reducing rear-end lift at speed, but again an engine failure stopped the car before the end of the race.