Will my case fit the NZXT Kraken 62x 280mm AIO

I used to own the 450D which is identical to the 750D Airflow Edition besides the fact that the 750D is slightly taller:

I would not recommend putting a 280mm rad in the roof, i doubt it's even possible, problem is that the 5.25" bays get in the way of the radiator when installing, so even with a 240mm radiator it's a pain to get in.

You're better off putting it in the front, then adding fans to the roof which intake into your computer.
 
Brilliant guys,

My Vega 64 AIO radiator is at the back of the case which may get in the way. I can see in the picture he has put it close to the back which may get in the way of my VEGA 64 AIO, as that sits at the back of the case.

240mm should be better?