will these holes let enough air in?

[dxkj]

hey folks, thanks for your help, I have a GAteway E-4200 that I feel like hacking up a bit heck yeah... so Im going to be installing a 120mm fan in the front, it is going to be the SOLE input fan for this machine.. the output will be the ps fan, a 80mm below that in the back/top... and possibly a blowhole on top... look at this case and tell me if I should hack up the faceplate to let enough air in for a 120mm fan... the holes start small at the top, and are a larger, oval shape at the bottom.. the underside of the faceplaec it mostly open so it can get air under that lip as well... thanks

This is the picture

 

[Viperoni]

Probably not.
Break out that drill and start drillin em out

 

[Jhhnn]

Wait til the fan is installed, see what you have. Check the airflow with the bezel both on and off, then make up your mind. There is a point of diminished returns with this stuff beyond which you are just making more noise and more work for yourself.