Markp, you done amazing things with the size of the case. Hard work to get it to fit. Good job.
Ever thought to get allthread and some nuts and back that rad off 3-4 inches? You won't have to use the case fan thng you got now and you can isolate the case air flow more from the rad.
It's real easy, if you got a hobby store and sure of your thread pattern your set. Seen it done many times and looks good too. You can drill a few holes in the case to overcome the smaller fan size in the case. Better temps, thats the key.