I tried to clearance the banjo bolt, but I'm afraid to go any further. I can still crack it loose, but if I take anymore off, I don't think I'll be able to service the brakes... It's very, very close but still contacting wheel.
With the rear Cobra rotors being 11.65" in diameter and the V6/GT rear rotors being 10.5" you could swap to the V6/GT rear brake setup and they would clear no problem. About the best you can do with the V6/GT rear rotors is to get the drilled and vented ones as there are not vented units that I am aware of.