Nah didn't end up buying it. The 12 hour drive thing put me off the most, kind of kicking myself now though cause it went so cheap. Would have been a good learning experience too ;)
Oh well, I'm always on the look out for a cheap 20v 4age around brisbane, so if anyone knows any, send me a msg.
I have to ask too, how much did it cost to get your mechanic to do the conversion. I tried to hit up a place i knew (dynotune, brownsplains)to see how much it was, (i figured if it wasn't that much extra i may as well get a professional to do it and get a warranty too) but they told me not many places do them cause theres no money in it. If anyone knows a place that will do it and cheap let me know. Otherwise i'm all about doing it myself (i should do this >.<)