Running temps, Australian 409

[MYTA21]

At a time when those with Bristol cars in Australia are reading reports about the snow in the UK, but facing temperatures approaching 40C in South Australia, perhaps I can ask what engine running temperatures are the norm for 409's in high ambient temps?
In the cooler months, the car has run about the 80-85 C mark, but in today's
35C ambient, it was running about 10c degrees higher. Fans were on very quickly and the switching on of the heater took the temperature down a noticable amount,as is usual. ( Good way of losing weight!)
I am tempted to have the radiator checked over, before we take a long trip to Victoria. I have done the usual flushing and cleaning. Any specific advice from Australian owners ref possible recoring? I have heard of some rads being worse after such work.
Thanks
Mike O