I've received a message from an enthusiast looking for this New Zealand race car. Its an HQ Monaro coupe, built up in the late 1970s or early '80s for Bob Cullinane to race in the Production Supercar series, which was a sort of follow-on from the Castrol GTX production series. At the time it was a big budget car, and ran strongly. It was painted black. Strangely, it appears it was built from a luxury LS Monaro, not a GTS. Cullinane raced it briefly, before moving across to race a Sports Sedan, and the Monaro was bought and raced by John Arkley. Its possible the car eventually made its way to the South Island with another owner.

Does anyone know what happened to it, and if it still exists?

Here is a photo taken by Tony Growden at Pukekohe, possibly with Arkley driving it.

Name:  mr5064.jpg
Views: 1886
Size:  122.4 KB