10-11-2020, 05:01 PM

3tas4me

Ultimate Warrior

Join Date: May 2004

Location: Wisconsin

Posts: 1,252

Does anyone have the vacuum hose diagram for a 1974 400 4-speed?

I am ready to install my new vacuum hoses on the '74. The factory service manual does not show a diagram for a 400 4-speed car and the one 4bbl diagram they have shows a dual diaphragm EGR valve which mine does not have. I heard the 1974 Pontiac Exhaust Emissions booklet shows the correct diagram. Anyone have this that can post up the pic? Thanks!

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