You may be able to get it to fit. I'll take some pictures of the predicament later tonight.
gary, you MAY be able to fit a 360 in the front if you orientate your 480 barbs towards the back of the case. Depends on the design of your rad.
Even with that said, I don't think you will fit a fan on the lower 120MM section of the 360. I'm looking at mine now, and even with my 480 swapped the space left for a 360 is minimal.
A quick question are the doors on the bottom of your case sturdy. I just received mine and one side seem to hold better then he other?
Goto 27:40 to fit your 360 rad on your HDD cages if your tube runs allow
Was it not possible to do 2 separate loops? cpu and one gpu on one loop and the other 2 gpu's on the other.