headers vs manifolds on a 318 2bbl difference ????

You guys have beat it to death and I will add my 2 cents (without watching the video).
Headers on a 318-2 may not make any more hp without other supporting mods to improve airflow. To add headers and not improve the breathing ability of the intake side is kind of like buying your sister breast implants. They look great but you don't get to use them.