Old computer case with no airflow

[i45]

Hello I am planning to build a pc using second hand parts.

I have a case that I want to use but it doesn't have much airflow(if any at all?). 
It's an older case originally from a packard bell computer. I beleive it's µATX and I really want to use it.

My question is, will i be able to use this case and build a system without fans?

This are the specs that I will probably get:

i5 
8gb ram
120gb ssd
1tb hdd
500w psu
and for the gpu i was thinking something like a gtx 760.

Do you guys think the case will be sufficient?

 

Here's a pic i found online:

[Rolling Potatoe]

You can just hotglue a 120mm intake fan on the side and use the psu as an exhaust,

should be god enough for your specs. A dust filter might also be usefull.