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On the 1984 normally aspirated B23F, the pattern of nipples on the inside of the manifold looks like the right hand portion of a capital H. At the left center is the flame trap nipple. Bottom right goes to VC Ignition computer, middle right is plugged or for cruise accessory, upper right feeds cabin hvac controls.
Forward on manifold near the throttle body is a short hose to the FPR. Opposite side toward firewall is the big hose to the brake booster. All other vac lines are throttle body side for evap emission control.
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