Unless I am mistaken, the Trenoweth XJS is the ex-John McCormack car, while Bob Tindal's Hatchback Torana is the ex-Garry Rogers car. The ex-Tony Edmonson Alfetta Chev run by Chris Clearihan had been around since 1979, back then it had a 5 litre Repco-Holden V8. Tony won the 1980 Aussie SS title and again in 1981 using a 5 litre Chev. It got a 6 litre Chev in 1983.
Classic stuff isn't it! Sports sedans that start their lives often in the late 70's or early 80's as one car, evolving over many years, and often in varying hands. Don't you love Australia in the 80's!?