Don't use brass barbs or you'll crack the impeller housing at the inlet. Check out this article:
http://www.procooling.com/articles/h...___3_31_00.php
for dealing with leaks.
Other than initial leaks and tendency for the inlet to crack over time with brass barbs, the Danner is a decent pump. I used a 250gph one for a long time.
I watercool in a similar case; I removed the lower hdd cage to get room for a heatercore though:
http://www.procooling.com/~phaestus/chevettehole.jpg
Have fun!