Yeah, the louver will also create clearance to access the ports.
Another thing you can do is to make a hole right on top of the CPU heatsink fan and use it to pull the air out. That would be more effective, the air gets out faster. Depending on the success of this option you might even be able to just remove the 60mm pair. You have another side fan.
Modding is fun, there's so much things we can do with a simple case