What's the car?
1. If you're sure the parts you'll be getting are the right ones for the car etc, I would definitely chuck them in the car before it heads over. They will be cheaper to buy in the U.S. and you don't have to pay shipping.
2. You'll have to check with the shippers on the car not being driveable, I assume they'll charge you extra for the work involved in getting it off/on.
3. Search on here regarding shipping (look in the importing forum) there has been heaps of discussion.
4. Matt (Shermatt) from here deals out of Florida, if he doesn't see this, U2U him or here's his link
http://www.shermatt.com/pages/home/home.html5. I have a friend who wanted to buy a Harley in Florida and send it to Perth, if you U2U me with your details or email elanta@iinet.net.au, you may be able to do something together.
6. If you haven't already definitely read up on importing a car on the Customs website, you need a permit before you bring it in, there are traps for aircon cars also. Here:
http://www.customs.gov.au/site/page4371.aspGood luck, let us know how it all goes.
p.s. I have shipped to Perth, as have others, not that big a deal. And from the East coast U.S. is not that big a deal either, just not as popular.