Tricked-out Chevy six cylinder engines

[aggie91]

Originally Posted by greg64

...I'm kind of thinking (but never tried) that a dual TBI on a dual 4bbl manifold would be the ultimate because it would cut down the runner length for the fuel and it would make the manifold more symmetrical for more even air/fuel distribution...

Like this:
http://www.cliffordperformance.com/

First picture is a dual thottle body TBI set up like you mention...