'76 Ford 302.
I noticed that the water passages at the rear (cyds #4 and #8) of the intake manifold are blocked off and thought this might have had something to do with smog control in the late 70's.
However, on the replacement 5.0 I put in its place the EFI intake also has the water passages to those cylinders blocked off. There are openings in the heads but no way for the water at the extreme rear of the head to circulate.
Does anyone know why they were designed this way?