go back and read all of this post; a lot of the info is in there;
Leo Santucci's book Chevy Inline 6 Power Manual....a must have- has stuff you have never even heard of!.
www.inliners.org
Langdons Stovebolt
http://www.t6racing.org/
clifford engineering.com
self racing.com (for race engines)
offenhauser intakes are still around, even at Summit
PS. I just scored a '75 292 that looks like a solid engine.
Can't wait to get done, hopefully in the next year.