One more thing to add, I am a CAD engineer at Chrysler. Although, I'm now working in the design studio, in my previous life I worked in the engineering side of design. I know how this stuff is engineered and everything that is involved in the design of these pieces.

The big block is a great piece and can handle some pretty impressive power numbers, but it was designed in the 1950's with 1950's technology. The GenIII Hemi was all designed on Catia V5 and has gone through countless hours of testing and computer simulated stress analysis using all the latest engineering tools and technology. This is how you can get an engine today that is much stronger and much lighter. This goes for the the GM LS motors and the Ford mod motors too. All of these stock casted components are withstanding 1100, 1200+ horse power and living to tell about it.