hello ! drill some big holes into the back of your case at the top and the bottom. glue some mesh against them to prevent getting dust inside.
-- mrsupersubsonic
Definitely another way to do it! And this actually makes sense, because you'll have your cooler air entering at the bottom, warmer out of the top, and all of the cooling would be passive and convective, ergo no need for a fan, etc. I do note, though, that it might make more sense to use "slots" rather than just holes...something along the lines of 1" high and 6" across for a typical 84 to 104 hp cab. Two in the bottom of the cab's back panel, two in the top, add some mesh (just glue it in) and you'll be SET. Plenty of airflow, and that'll help keep both drifting and weirdness AND component thermal stress under control.