Stan, Shaun, Garry & Tom - hanks for all the positive comments, it is much appreciated.
Good pickup on the whitewalls Garry, they are 205/75 series and fit perfectly on the original 6" rims. I had to deflate the spare one slightly to clear the trunk lid ! But I like the way that they fill out the arches.
If circumstances permit I will indeed make it down to Canberra, but my dad is very sick at the moment so I can't confirm with any degree of certainty.
Tom, from memory these whitewalls are a US brand (Coopers?). I will check my invoice file tonight and let you know. They were ordered from John Cain in Newcastle who gets them directly from the USA. They weren't cheap but I am very happy with the quality, tread, handling, etc. The whitewalls are three years old and still as white as the day they were delivered.
Shaun, hope to see you down under one day soon ! Coffee will be on me.
It's an honour (and pleasure) to have the means to maintain and drive these cars.