ok I did a little research now http:\\
www.cheaperthandirt.com sells a 50 cal ammo can now if this is what your looking at to build your case it is only 11" l x 5.5" w x 10" d. So it will be a tight fit close to desktop size. If you really decide to do this I belive the best thing to do is cut a small hole as an exit for the cables and not to remove the whole side. if you put a small hole at the back of the lid then you can pop open the lid and through the cables inside but unless I have the kind of ammo can you want wrong then it will be a tight fit and your drives will have to be on there sides.