For Legion's McLaren M4A, available on his blog.
Very few M4A's were built, with one of them first going racing with Graeme Lawrence in 1967. After the team that owned the car, Chequered Flag Racing collapsed, Graeme took the McLaren with him to down under and raced it for a while in national events.
I can't find much else about the car, as the only photo of it racing in period is described with either being from 1968 or 1969. In any case, the livery looks good.