From a very reliable source....
VH-FDP, A model. 260 hp engines, was only a 5 seater
VH-FDD, B model. 260 hp engines, 6 seater
VH-FDG, B model. 260 hp enhines, 6 seater
VH-FDJ, C model. 285 hp engines (air scoop on top of engine), 6 seater
VH-FDT, C model. 285 hp engines (air scoop on top of engine), 6 seater
all models had a half door RHS rear. Came standard, this wasn't a RFDS modification
VH-FDN, 58 model, had full height double doors RHS rear.
VH-ADB, 58 model, same doors
VH-AYV, 58 model, same doors