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Old 04-10-2007, 03:57 PM
chevymastermind's Avatar
drive it like you stole it!

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vacum hose hookup location?

ok so i have a 1971 nova with power breaks! where do i hook up the vacume hose to?

also the location of a vacume modular line hookup to the engine of a TH-350 would be nice too?

thank you in advance!

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Old 04-10-2007, 06:15 PM
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mostly confused

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Do you have a stock manifold or aftermarket? Either way it will hook up the same. It will need to be conneted to a large vacuum port. It may have a plug in the port. It is usually behind the CARB. The vacuum modulator also needs manifold vacuum . I thought I had a picture but I don't. Brian
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Old 04-10-2007, 06:53 PM
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On both my original quadrajet and my Edelbrock, there was a large threaded port on the back of the carburetor. You thread a compression fitting and short section of steel tubing onto the port and then run a large diameter rubber line from the tubing to the brake booster. The PB fitting and tube is standard size. You can get it from a junkyard, or almost anywhere that sells carburetor parts.

There is another vacuum fitting screwed vertically into the stock manifold, behind and to the passenger side of the carburetor. The hose connection on the fitting is usually bigger than your vacuum line to the TH350, so you will need a short section of the larger hose and a step down fitting with a connection for the line to the TH350. The fitting usually also has another port to run vacuum to the heater controls.
The stock setup usually has a combination of an L-shaped steel line and short vacuum hoses on either end. The steel section is used for the part of the vacuum line that goes over the valve covers and around the exhaust headers.

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