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Old 03-30-2011, 08:46 AM
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Vacuum Hookup problems on a 1967 289

Hey guys,
Got a 289 with 2 barrell Autolite carb attached to it. The problem I am having is hooking it up correctly. Just as a heads up, I DID search for diagrams and searched the forums as well.
When I bought the car, the vacuum was jerry rigged up and I just want to do it the right way. It seems as though the diagrams have different parts than I have, or they are not specific to my car. For example, they have a diagram for a 289 with AC, and my AC is bypassed not working!
To be truthful vacuum confuses me, and I would like to just get it hooked up ya know? Any help is appreciated

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Old 03-30-2011, 10:05 AM
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If its in that nice pickup there then you may only need a few essential vacuum connections, decide what you want to keep for accessories and post them devices.

Stock trim there are temperature activated switch valves, diaphragm valves, egr crap etc etc. You may not want that or maybe u do

Bare bones may look like distributor to carb, intake manifold/carb to power brake only,,,hard to tell from here, the hood is shut
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Old 03-30-2011, 10:50 AM
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67 289 2bbl intake and carb...needs dusting
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Old 03-30-2011, 11:31 PM
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You truly only need two pickups, one is ported vacuum for the distrib advance and the other is full port vacuum for the power brakes. The power brakes connects to the large fitting on the rear of the manifold (full vacuum) and the distrib ported vac source is on the carb...easy to find which one it is with the engine running...it has little to no vacuum when the engine is idling but gets vacuum once the throttle plates open up.

Unless you have vacuum operated accessories everything else can be blocked off, the 67 engines didn't have any EVAP devices or temp controlled distributor vacuum switches so it should be easy.

If you want more detailed advice a picture of your existing setup would be necessary.
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Old 03-31-2011, 12:44 AM
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the large port on carb spacer goes to pcv.

the long metal tube goes to c4 modulator valve if you have auto trans.
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Old 03-31-2011, 09:05 AM
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So basically,
The large one in the back is full vacuum. That one goes to the valve cover Im almost sure. Then the other to the vacuum advance on side of carb. Everthing else can be capped off? I would like a pic if ya got one 4 JAW CHUCK! Thanks for your help guys!
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Old 03-31-2011, 09:08 AM
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oh never mind. You want a pic from me!
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Old 03-31-2011, 10:26 AM
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Quote:
Originally Posted by jsm1847
So basically,
The large one in the back is full vacuum. That one goes to the valve cover Im almost sure. Then the other to the vacuum advance on side of carb. Everthing else can be capped off? I would like a pic if ya got one 4 JAW CHUCK! Thanks for your help guys!
yeah, the large one to a pcv valve that normally plugs into valve cover. important to have pcv.

the distributor vacuum advance is sometimes plugged into full time vacuum port and sometimes into the part time ported vac port on side of carb. i like dist plugged into full time vac for saucy cam and ported vac for mild cam.
can try both to see which works better.
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