Liquid cooler 120mm, case fans 140mm

Hello, I recently bought a Cooler Master HAF X case (it's a beauty) and a Corsair H70 liquid cooler. I'm transferring my mobo and etc from my old case in this weekend, but I just realized something:

The fan on the back nearest the mobo is 140mm. The liquid cooler rad is 120mm. Am I in trouble, or is there a way I can mount it to the 140mm fan?

Secondly, I've never installed a liquid cooler before. As far as I can tell, the rad needs to be sandwiched between two fans which are both blowing outward from the case. Could you confirm this for me?

Thank you so much in advance, I really appreciate it (and first time poster). I'll seek to help elsewhere I can in the forums.

-L