Guarenteed you will be spending alot to do that conversion. U will need to some pretty extensive fabrication and have access to machinery not found in the average american families workshop. I know i wouldn't be able to do that. Or you could hire someone to make the parts who is able to figure it out for u, like a CAD worker or machinist. It's probably not worth it. a tt01 is prety cheap, and you'll be drifting with a simple set of PVC tires in 2 seconds instead of 2 yrs trying to figure out how to convert yur rwd into 4WD. It can be done and if your willing to aquire skills to do then go ahead and learn. It would be cool but kinda pointless.