Source of vacuum for booster on 1965 GTO with AFB

cnemike

New member
I am presently restoring a 1965 GTO with the Carter AFB. Can anyone tell me where the correct source for brake booster vacuum would be on this car? There are two vacuum ports on the manifold in front of the carb which go to the PVC valve and there is one small port near the base of the carb on the back side but I am assuming this is vacuum advance for the distributor. No other vacuum sources are present.
 

melsg5

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cammerjeff

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According to every thing I can find on the web, the 64/65 4bbl brake vacuum source is a female port on the back of the Carter AFB that that a hard line threads into. then the hose attaches to the hard line to the booster.

Is there a plugged port around 3/8"?

I should add that I owned 1 65 GTO about 35 years ago, but it was a Tri-power car so I do not have any actual Experience with a AFB equipped Pontiac Engine, a lot of Q-jets but the only AFB powered car I have is the Astre with the Buick 215V8.
 
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