Speak to some one who has one approved already some engineers will see you coming $$ wise so dont roll yourself. and get help read up on it. plenty of info here on qld modified utes lots of people out there selling crossmember kits and doing diff conversions that are approved ,lots of info on brake conversions for 1200 s too........You can go 12a rotary have a look on ausrotary.com or ipswich rota club .plenty of cheep housings for sale and heeps of info on conversions .If yo do a rota conversion make sure u use the short 4 speed not the long one as its wont fit the shifter hole also you will have some fun fiting it your crossmember will have to be modified to suit the rota mounts maybe once mine are done i will take some photos for others that want to go a rota