Can't help with images of Moffat but the way I understand it was that Ford wasn't happy with the Chargers domination in NZ so they sent their best car and driver to Wigram because there was some weird points system where if Leo didn't win Reg Cook would win the series in the BDA Escort. As it was a GTX race Moffat's car that arrived with adjustable shocks and racing tyres was outside the rules for GTX cars so had to be fitted with standard shocks and Dunlop tyres same as the Chargers and others. There seems to be conflicting reports of how the race started with Motorman saying the order was Leo, Ron Rutherford, Moffat but Autonews reports Leo. Moffat, Rutherford. Anyhow at the end of the day the winner was Ron Rutherford, this is how he remembered the day for NZCC mag:

Wigram was one of my best races - I won and defeated Allan Moffat from Australia in his GTHO Falcon. Ford decided it did not want the Chargers winning all the races, so it flew in a GTHO with none other than Allan Moffat. After practice Leo was on pole. Allan was in the middle and myself on the outside. Moffat's words after practice were that our Chargers were the fastest in Australiasia.
I noticed in practice that my car was locking a front wheel over the infamous Wigram drain by the Hangers so I let the brakes off and put them back on after the bump. Off the line Leo took the lead from Allan. I was able to take Moffat on the back straight and cling onto Leo. I noticed he was locking up a front wheel at the Hangers and after a few laps he blew a tyre. Rod Coppins chased me for the rest of the race.

This pic shows the order as Leo, Ron, Moffat before any alleged fuel problems with the HO


And the winning car:


Later in the day Moffat was reunited with his trick shocks and tyres and went on to win the final race for modified saloons