Calder

Ian Geoghegan qualified on pole position with a record time of 48.3 seconds. Bob Jane was second ahead of Norm Beechey and Alan Hamilton. After blowing an engine, Beechey and his crew faced an overnight rebuild in order to make the grid. Beechey's car was repaired in time for the race and he took the lead off the start, only for Geoghegan to move past at the first corner. After a slow start, Jane passed Beechey on lap 4 and then overtook Geoghegan for the lead on lap 5. Beechey suffered another engine failure on lap 7. After conceding a five-second lead to Jane in the first two-thirds of the race, Geoghegan began closing the gap towards the end of the race. Both drivers set a new lap record of 49.1 seconds before Geoghegan made a move for the lead at the end of the straight. The Mustang's brakes faded however and Geoghegan ran wide, allowing Jane to take the win by five seconds. Hamilton finished third, one lap down on the leading pair.^[2]

Bathurst

Ian Geoghegan dominated the second round of the championship at Mount Panorama. After qualifying on pole position by over five seconds, he proceeded to build his lead by over ten seconds per lap during the race, winning by a lap over the Porsche of Alan Hamilton. Phil Barnes, driving a Morris Cooper S, finished in third place. Bob Jane had qualified second but blew an engine on lap 9, while Norm Beechey did not even start the race after an accident in practice. Hamilton did not have a smooth run, either, damaging his car's suspension in practice and having it repaired at a local workshop.^[2]

Ron Gillard, in a Cooper S, and Bob Morris, in a Corolla, battled during the early phases of the race before the Corolla's clutch failed. Morris stopped at the top of the circuit, planning to coast down to the finish on the final lap. However, the car stopped fifty yards short of the finish line and Morris had to push it to the finish. With Jane's retirement, Geoghegan took the lead in the points standings while Hamilton moved up to second place.^[2]

Mallala

Bob Jane took pole position for the Mallala round ahead of Ian Geoghegan and Allan Moffat. Norm Beechey again did not start after blowing an engine in a preliminary race. Geoghegan was left with an easy victory after Moffat retired on lap 2 and Jane retired at the halfway mark. Alan Hamilton finished second, 44 seconds behind Geoghegan, with Peter Manton in third. Only seven of the fifteen starters finished the race. Geoghegan assumed an eight-point lead in the championship over Hamilton, with Jane maintaining third place courtesy of his victory at Calder.^[2]

Surfers Paradise

Ian Geoghegan took his third pole position of the season ahead of Norm Beechey, whose time was equalled by Alan Hamilton. Geoghegan moved into the lead at the start of the race and pulled away from Beechey, before hitting a dropped exhaust pipe on lap 8. This punctured a rear tyre and the resulting pit stop left Geoghegan two laps down on Beechey.^[2]

Despite being up to four seconds a lap faster than Beechey, the race was not long enough for him to reach higher than sixth place. Beechey took his first win of the season, and the first championship race victory for Holden, with Hamilton again finishing in second place. Jim McKeown finished third. Geoghegan's troubles saw his championship lead drop to just three points over Hamilton, meaning that the title would be decided at the final round at Symmons Plains. Peter Manton moved into third place in the points standings after Jane did not take part in the race.^[2]

Symmons Plains

Ian Geoghegan led Alan Hamilton by three points coming into the final round. However, due to each driver being required to drop their worst result from the five rounds, Hamilton had to win with Geoghegan failing to score in order to take the title, as he would drop his four points for third place at Calder. Geoghegan took pole position ahead of John Harvey, driving Bob Jane's Mustang. Harvey was followed by Allan Moffat, Norm Beechey and Hamilton. Geoghegan's car failed to start at the one-minute signal and the race began while he was still in the pits. His pit crew eventually push started the car but this meant that Geoghegan would be disqualified. With Geoghegan out of the running, Hamilton just required a win to take the title. Harvey took the lead at the start ahead of Moffat and Beechey. Moffat's engine failed on lap 7, elevating Beechey and Hamilton into second and third respectively. Harvey led the race by ten seconds, with Hamilton fourteen seconds off the lead.^[2]

Tyre punctures for Harvey on laps 15 and 16 forced him out of contention, leaving Beechey in the lead and Hamilton in second. Beechey extended his lead until transmission problems saw him unable to use the lower gears. As a result, he had to slip the clutch to keep the car accelerating at low speed. Hamilton closed the gap, getting to within a car length of Beechey going into the final corner. Beechey was able to accelerate away from the Porsche on the run to the finish to take the win over Hamilton and Jim McKeown. Despite the looming disqualification, Geoghegan continued on in the race, breaking the lap record and eventually making it back on to the lead lap. With Hamilton failing to take victory, Geoghegan clinched the title by one point. Beechey's consecutive wins in the final two rounds saw him take third place in the points standings ahead of McKeown and Peter Manton.^[2]