"We are giving Mustang a proper birthday today, with the Australian unveiling of the new 2018 model and confirming its Australian track-debut with Supercars in 2019", said Ford Australia President and CEO, Graeme Whickman.
However, the arrival - and subsequent success - of United States motor racing magnate Roger Penske, along with the runaway success of the Mustang sports auto in the sales charts, has seen a change of heart in Broadmeadows.
The build will be executed by Ford's two strongest Supercars teams, DJR Team Penske and Tickford Racing. Ford sold 125,809 Mustangs worldwide previous year, making the model the best selling sports-coupe in the world, says the American carmaker citing an IHS Markit report.
Global Mustang registrations in 2017 totaled 125,809 cars, according to Ford analysis of the most recent new light vehicle registration data from IHS Markit.
The NASCAR Mustang will see action for the first time in the Cup Series at Daytona, on February 17 next year.
Ford hasn't officially supported Supercars since 2014, when the current FG X generation of Falcon was homologated (and which privateer teams continue to campaign).
"We're in partnership", said Mr Whickman, who declined to specify how long the deal would extend for. "Mustang is a flawless fit for our racing heritage today and tomorrow".
A close-up of the new 2018 Ford Mustang. The other is Tickford Racing, which previously raced under the Prodrive and Ford Performance banners, and last won the drivers' title in 2015. Better than that, it's using a Mustang to do so, replacing various versions of Falcon that have seen service for the past quarter of a century.
Earlier this month, Holden turned off the two-year old funding tap on its own troubled twin-turbo V6 development program, run by the company's anointed factory outfit, Triple Eight Racing. "The Mustang brand has such an iconic history in motorsports and it will be great to be racing them in multiple Series".