Match Race = 1968 Road Runner '383' vs. 1964 Belvedere '426-S' Street Wedge

Your Welcome A-Body-Bomber,

The 1964/1965 426-S 'Street Wedge' Intake Manifold is generally regarded as a poor unit.

The Low-Profile Design was adequate for 'low' RPM Horsepower and Mid-Range Torque, but it restricted
flow and limited 'higher' RPM breathing.

By comparison, the 1968 '383' Intake had nearly 50% more flow in the runner ports.