Here is an article about Fords Trans Am Mustangs...
http://www.mustangandfords.com/featu...302/index.html
Ford developed the Dominator carb with Holley to get around the rule of limiting the engine to only 2 carbs. This rule was made to eliminate Webers. Ford responded with Dominators and inline four carbs. Note that in the article it says the intake manifold is an IR (Individual Runner) manifold.