If you've got space constraints like that, have you considered a non-full cover block like the Swiftech MCW60? (http://www.petrastechshop.com/swmcgpuwa1.html) In theory, although I've never seen it done, you can mount it so that the fittings are point towards to the side of the card rather than the top. Also, it may work with them pointed towards the top depending on exactly how much room you've got since you can bend the tubes a bit.
![[H]ard|Forum](/styles/hardforum/xenforo/logo_dark.png){kind=logo}