Have a read here
https://www.infrastructure.gov.au/ve...ports/new.aspx
Ive never heard of the LHD/RHD conversion being required. Might be SA specific but dunno. Certainly not at the time in NSW QLD or Vico.
The real issue is proving the vehicles age with supporting docs to get pre-import approval while at the same time NOT handing money over for the car because if the GOV knocks you back you own a car you cant get into the country. Most have been done through 3rd parties who sight/know the car, know its providence and have the docs to prove it. Makes the wait a little less intense.
Its all even harder now as people bastardised the system (aka bringing in FFR made in mid 2000's but claiming its a 65) as well as the issues over proving it has no asbestos etc etc. Those who falsely imported cars as 65's are being sighted at car shows and the like and being told to come into the DOT PITS for inspection to prove their age. Babummmm.
And lastly, pre 89 cars are rare on the ground per capita of ownershop. Contemporary yes has a few, ERA maybe as well. Had there been more I can guarantee there'd have been someone specialising in bringing in those cars here but there's not enough to go around to make it viable.
All the loop holes have been tried. Stay on track and do it legit. There are a few expensive cobra sized paper weights sitting in garages around Oz atm.