Some good discussion over at Speedtalk, about turbo head design/porting... http://speedtalk.com/forum/viewtopic.php?f=15&t=27429 Ya, I know... "But, I gotta sign up to view it"...Suck it up, buttercup. If the topic is of interest, spend the 2 minutes.
You need to check out ENGforum then Chuck. I think you might find it interesting and there's tons of info on it about turbos and suspension as well as engine flow theory.