Thanks Tony. They were good looking cars those Mustangs. Both the Anderson cars now race in Historic Group C/A in Aus, restored back to the Picepac livery. I remember one of them being for sale on Trademe approx 7-8 years ago for about 35K, seems their value has gone up quite a bit since then!
There was another Group A Mustang that raced in NZ, a white one owned by Bruce Flemming. I wonder where this car is now?