So, I'm going to be receiving a couple of FTW Hybrid kits to slap on my 1080s here soon and I'm going to be upgrading/adding fans to the radiator.  I'm going to be doing push/pull on the radiator so my question is does anyone know what type and length of screws I need to add another fan to the Hybrid kit's radiator?

Hello,
 
the radiator takes standard #6-32 UNC screws.
 
The length will depend on the fan depth but for most fans you will want 1 1/4 inch screws.