Even though it's geared toward the LS engines, I thought it was well worth sharing. Tom Nelson (Nelson Racing Engines) gets into a lot of good theory on engine efficiency and proper build techniques.
[video=youtube;VsmbbuSq9m0]https://www.youtube.com/watch?v=VsmbbuSq9m0[/video]
[video=youtube;VsmbbuSq9m0]https://www.youtube.com/watch?v=VsmbbuSq9m0[/video]