[boxhead]

Welcome along Luke.
Since you are in Melbourne I wold get along to the club meeting and talk to a few of the guys who have cars, listen to what they have to say.
I am not sure if you are mechanicaly minded at all or if you have the time to put into building 1 of these cars.
I dont think there are too many on the market for sale with the Gen III fitted yet as there arent a lot registered yet.
Ask around and do some research, at the money you are talking you should be able to find a decent well sorted car that could be afew years old and complied with the small block windsor fitted.
Dont be afraid to ask any questions in here as an answer will not be far away.