This is (or was) the Whatmore-Jaguar Special.
The car was first built in 1950 by Charlie Whatmore in Queensland, using a Standard 14 chassis and a Studebaker V8 engine. The car in this configuration was known as the Studebaker Special. In 1954 he replaced the engine with a unit from a Jaguar MkVI and renamed the Whatmore-Jaguar Special. By 1956 the car was no longer competitive and it was sold to Trevor Baltzer of Brisbane who replaced the single seater bodywork with the GRP item seen here, and installed a Holden motor. The picture shows it just prior to restoration back to 1954 specification.