The First 1967 383 A-Body, 'Barracuda or Mr. Norms's Dart'

1967 '383' Cast Iron Intake Manifold #2205968 (Below)

1 7/16" Primary x 1 9/16" Secondary





The 1968/1969 '383' Intake Manifold #2806301 (Below)
1 11/16" Primary x 1 11/16" Secondary

{10% greater branch and 50% greater runner sizes}