^ Which basically is no help whatsoever, to the OP's original question??
Beno...Im almost certain that you will need a similar bracket to the one that you and I have got for the fronts....to get them to fit. Have you measured the bolt spacing on new Rear GTO calipers, to confirm this? Or change the hubs to gto ones as well which then stuffs you up with your new 17s :blink:
Then you have the handbrake issue to deal with...
Check this out....
This bloke has done it but he used the 5 stud hubs from GTO by the looks
http://www.driftworks.com/forum/drift-car-projects-builds/56575-mmc-lancer-evolution-iii-rs-rwd-drift-spec-3.html
^ Still an interesting read but....... he has gone all out :blink: :lol: