Here is the Ford Manual: http://iihs.net/fsm/?dir=165&viewfile=IntakeManifold.pdf
Here's the whole thing for Mustangs, including the GT500. I gave you a link to the r&r because it's a little hard to get to from the starting page. I try to give Louie a donation every year, he's the guy who maintains the site.
http://iihs.net/fsm/?dir=41