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The car that Max drives (a black "Pursuit Special"; the phrase "the last of the V8s" was used once, and later as "the last of the V8 interceptors" was used until Mad Max 2: The Road Warrior (1981)) is a production car, the Ford "XB Falcon Coupe", sold in Australia from December 1973 until August 1976. The car in the film had a standard 351 cubic inch (5.8 liter) V8 engine.
Most of the extras used in the film were paid in beer.
The "get-out-of-jail-free card" that Goose gives the triker was an on-set joke. Because of the limited budget, the biker gang was an actual biker gang (the Vigilantes), and they had to ride to the set each day in-costume; often with their prop weapons displayed. Since the production company expected them to be pulled over by the local police, each was given a letter explaining the film's peculiar requirements, and asking for law-enforcement's understanding and cooperation.
Tim Burns (Johnny the Boy) was so into character that he annoyed everyone on-set, and was abandoned one day during lunch while handcuffed to the wreck.
Some of the things Nightrider yells over the radio are lyrics from the AC/DC songs "Rocker" and "Live Wire."
James McCausland: The bearded man wearing an apron in front of the roadside diner watching the police cyclists and tow trucks drive away is the film's co-writer.