Nice car mate, congrats. If it is still registered (interstate) you just have to go to Vicroads, make a Miscellaneous registration appointment . Get yourself a rwc here in vic, go to Vicroads on the day and then pay for a full year reg and new number plates. My cuz just did this with an Evo he bought from NSW. They just checked the rwc and made sure vin and engine matched on their computer, gave him new vic plates and off he went. It cost him like $650