A "street tunnel ram" is a "crossram" IE "max wedge" style. A Mopar SB STR-12 is worth a considerable amount of money only because Edlebrock doesn't make them anymore, and from what I've seen they are a pretty poor manifold, suffering from fuel/ air distribution problems, and damage to the top plate due to backfire
THIS:
http://www.forabodiesonly.com/mopar/showthread.php?p=292932
is a "street tunnel ram"
