What Brent has in mind, besides alloy 2V heads, both AFD and CHI also manufacture raised 2V port, stuffed 4V port or 3V port heads. Of course these raised port heads flow better than any of the 2V heads.
But ... feedback from several engine builders indicates amongst the alloy 2V head offerings from Edelbrock, CHI, AFD and Trick Flow the Trick Flow heads are the best of the breed.
When it comes to a "stuffed" 4V port, there's a new head, the Scott Cook head, that will soon become the best of that breed. Ports and combustion chamber designed by Darin Morgan of Rehr Morrison Racing Engines ... and Scott also manufactures the best 351C stuffed 4V port dual plane intake manifold.
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If you use a 351C 4V powered vehicle for a grocery getter ... the eggs aren't going to make it home!