Photo on the Dog Box Club thread - there is a post regarding the Baypark Fire Truck - A Dodge that replaced an F100 that replaced a Ford Ranchwagon.
Here [ photo borrowed ] is the Ranchwagon, with a Tow Truck, Dodge Ambulance and the famous Timing Bus.
The Dodge - an older shot.
A recent photo- the vehicle is for sale and should be saved for NZ Motoring History.