Courtesy of the Mallala Museum...

Take a look at http://www.flickr.co...57624823729372/
Here is a piece on the history of the Mallala circuit that I wrote for Australian Classic Car in 2007:
The Mallala Motor Racing Circuit, 56 km north of Adelaide, was built on the site of an RAAF base which was used as a flight training school during World War II, and later became the base for flight test and transport for the joint UK-Australian Weapons Research Establishment at Woomera.
After RAAF Edinburgh was built closer to Adelaide in the mid 1950s, Mallala housed No. 24 Squadron until the base closed in May 1960.
Building the circuit commenced the same year, replacing the Port Wakefield track, which was about the same distance north again.
The 1961 Australian Grand Prix was held at Mallala, being won by Lex Davison in a Cooper-Climax after David McKay’s similar car was controversally given a one-minute penalty for a jumped start.
Although it is now 2.6 km in length, the track was originally a little longer, the back straight being shortened by .8 km at the Northern Hairpin (Goodyear Corner) in 1963 whilst the esses were re-profiled a little in the late 1960s.
Over the years the circuit hosted Australian championship events for sports cars, open wheelers and touring cars, both as one-off events and series, as well as motorcycle races.
When a Queensland company built Adelaide International Raceway at Virginia, 25 km north of Adelaide, they bought the Mallala site from the Mallala Motor Racing Co. and closed it down, moving some of the infrastructure to the new circuit. The last race meeting held at Mallala was a round of the Australian Sports Car Championship late in 1971, won by John Harvey in a McLaren M6B. Adelaide International Raceway commenced business at the beginning of 1972.
South Australian motor racing identity Clem Smith bought the Mallala site in 1976, although there was a covenant prohibiting motor racing there. This was the subject of a long legal battle, which Clem eventually won.
Over the years it did occasionally host the odd autocross or rally stage, whilst Clem carried out a lot of work on the site over the years.
Given a restricted licence by CAMS, the circuit was reopened in June 1982, later being given a full licence enabling it to again hold Australian Championship events.
One major change was repositioning the pit and paddock area from the infield to the outside of the circuit. The pit buildings used to obstruct the view of spectators across the circuit and this was a pet hate of famous flag man Glen Dix. Mallala now probably has the most unrestricted view of any motor racing circuit in Australia.
When Bob Jane, who by then owned both the Adelaide International and Calder circuits, fell foul of CAMS over his stance on cigarette advertising, Mallala was allowed to host Australian Touring Car Championship rounds from 1989. They continued to be held there until the advent of the 500 km race in the streets of Adelaide in 1998, later known as the Clipsal 500.
A round of the Fujitsu V8 Supercar development series was run annually at Mallala until last year, the main events at the site now being the Shannons Nationals twice a year, consisting of Formula 3, Supertrucks, Sports Sedans, Saloons, Production Cars, Superkarts, HQ Holdens and Commodore Cup.
The outright record is 1m 2.57 seconds, set by Paul Stokell in a Reynard 90D Formula Holden in 1994.
I'm trying to work out how to attach pictures. I'll put some on there when I can work it out.
JL