I decased a decesead 360 to fix it

No need to add a bunch of fans. The standard fan should work fine as long as there is a big vent in the back.
I would get the mad catz fight pads from vpgames.com, they are only 23 bucks a pop and easy to hack, that is what I did.
You don't need HDMI, just get vga cable for the xbox, you can find one on ebay for under ten bucks, once again, this is what I did...