It's easier to get LHD registered than RHD, as you don't need an engineer's report. (Providing the engine is no larger than 10% above original - 302 for 289 is OK).
If it's a 289 you will need to stamp an engine number on the block, typically the last 6 numbers of the VIN. Check that with VicRoads first, as you don't want to use a stolen engine number.
Rock up to VicRoads for inspection with your DOTARS import licence, previous ownership papers, payment receipt and a RWC. Fork out for stamp duty, rego, plates and you're away.
Or hang off until the new limited rego scheme comes in early next year to replace club permits. Big rego saving for restricted use and keeping a log book.