Don't want to poop on your parade, but unless you plan to be running mid 9s and 140MPH, i doubt you will get the fastest AU patrol title you would really like.......
http://www.westernlinkautomotive.com...s_yyynot.shtml
Its unfortunate, because i can understand what you are doing, (and i prefer your idea) and yours will be a actual "4wd", and be able to be used as a daily driver on the street "and" taken off road, the sad part as always with any type of drag "title" in general, is that sometimes street cars often have to compete with drag cars that have number plates.
Perhaps you could go for the fastest "4WD" Patrol in AU ?