Not Dunedin but some of the cars would have come South during the "Summer of Racing " that was NZ in the 1950's/60's

These are photos by John Sheppard who drove a rather quick Morris Minor in the Saloon Car Race.
Pictures are small but some good shots.

Name:  Motor racing Ardmore #9 1958 NZIGP The grid John Sheppard photo's 1 - 2 .jpg
Views: 862
Size:  38.5 KB

Name:  Motor racing Ardmore #10 1958 NZIGP The grid Maserati John Sheppard photo's 1 - 3.jpg
Views: 896
Size:  41.0 KB

Name:  Motor racing Ardmore #15 1958 NZIGP Maserati in pits John Sheppard photo's 5 - 5.jpg
Views: 889
Size:  43.9 KB

Name:  Motor racing Ardmore #8 1958 NZIGP Car 2 rear John Sheppard photo's 1 - 1.jpg
Views: 888
Size:  40.6 KB

The entry list NZIGP from Graham Woods
Name:  Motor racing Ardmore #23  1958 NZIGP Grand Prix entrants Graham Woods photo's.jpg
Views: 959
Size:  139.9 KB

The Saloon Cars from Graham Woods
Name:  Motor racing Ardmore #22 1958 NZIGP Saloon Car entry list Graham Woods  photo's.jpg
Views: 943
Size:  119.0 KB