As Doug brings up, wide base dual quad intakes were not a standard production item. But using carb adapters on any of the available small carb based 2X4 intakes is common place which allows the newer wide based carbs to be used. Here are links to past discussions on the carb adapters.
http://forums.y-blocksforever.com/FindPost83766.aspx
http://forums.y-blocksforever.com/FindPost83783.aspx