Antec NSK2480 Case Modifications to Fit ASUS GTX9800+

I have an Antec NSK2480 media PC case / enclosure, as seen here on their site: http://www.antec.com/pdf/manuals/NSK2480_manual_EN.pdf I also have an old ASUS 9800GTX+ Dark Knight as seeen here on their site: https://www.asus.com/us/Graphics-Cards/EN9800GTXPlus_DKHTDI512M/ I would like to add this card to my media PC to replace the GT220 that is in there …