The area indicated is where the top & bottom halves of the "common chamber", or intake plenum seal together. (or not)
The intake gaskets are located at the very bottom of the common chamber, between the intake & the heads.
Check out some of the pics & descriptions in Wormgods S/C tutorial for clarification...
You can clearly see the intake ports in the heads in the first pic, this is where the intake gaskets reside.
http://www.vehicross.info/forums/sho...percharger+101