Yes it does have to be converted to RHD.
If the cars over 30 years I think it can stay as is.
From what I gather you have the purchase price converted to the currency it's going to AUD (1 to 1 right now)
Many cashed up Australians are buying collector cars/boats and sending them south (our economy is the strongest developed nation in the world right now, with good buying power)
So say you've got your 150k GT, you then have to include the shipping cost as additional value, so say 15k (now 165k)
15% is added as it lands for duty.
Conversion is added (I think 30-50k), and Australian Design Rules may have the odd thing on the car changed (maybe indicator colour?)
then you'll have something like a 10% GST added and then 25% luxury tax built in to every dollar past 50k.
So you can see the govt can make well north of $100k-200k on the high end cars
Now even doing the math the seller is making a killing at this 600k.
Doing it yourself is by far cheaper and worth saving hundreds right now.
FYI.....When the GT came out it was priced at about 400k and that was with a weaker dollar, it seems to be following the competition on the current price point (Gallardo)
They cost about AUD$400k in 05, so to the GT, funny how the US GT prices haven't gone along way in the last few years, but now a decked out Lambo runs 600k, so to the GT.....scam.
Like I said, the GT will follow me if I ever return to OZ for good.
Stuart