Question about 1960s Pan Am 707s in SYD

[Jack B]

Not sure if many members would have any information, but was curious as to whether Pan American flew the turbojet 707-321's into Sydney from 1962 to the late 60s after the introduction of the 707-321B/C's in around 1962? I know they flew the original Pan Am jet routes to Australia from 1959 but am not sure if it become a turbofan 707 route only after '62. That said, I don't know whether Pan Am flew the 2 variants parallel regardless of engine type, or had specific route allocations