My advice to you is to not use an intercooler on the back. If you want to use it to push air into the right side that would be fine, but 80mm fans, or even a room fan pointed at the side would do better. Take off the right side cover and blow some air in with whatever you got, cut the plastic grate behind the fans, and you should be fine.
The intercooler tends to hold the heat in more then get it out. Get XexMenu 1.0 it shows temps