The rear wheel isn't much work,you need a couple of spacers,and the busa caiper bracket needs to be machined down (.125 i think) need gsxr rotor
putting a 06 wheel on the front gets very complicated. (read expensive)
The 01-04 1 k front wheel will go on pretty easy,busa rotors bolt on and all you need is spacers.
I am looking for a 05/06 1k rear wheel now.