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Old 10-07-2008, 08:44 PM
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Required Vacuum Lines

Hello I bought a 454 that was taken out of an 86 one ton truck. I have gone through the majority of it to check things out before I install it in my car but ran into a problem with the vacuum lines. I guess when the guy took it out of the truck he just started pulling everything off so i have no idea where all the line go. I have a Chilton manual but it shows the diagram for an engine with a smog pump. Since I'm not running all the emissions I need to know what is necessary for the engine to run properly. I know i need to hook up the brake booster, pcv line and an ingition advace line, are there any others I have to have. Also is it ok to hook the ignition advance directly to a manifold vacuum source or does it need to be regulated by the carb. Any help would be greatly apreciated Thanks in advance for any replies

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Old 10-07-2008, 08:52 PM
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You pretty much have it covered. All I can add is if your intake has an EGR valve, that will need to be run through a temp switch, usually screwed into the thermostat housing.

You may also need a "manifold source" hose for any under dash heater/A/C controls.

You may also need a manifold vac line to the trans, if it has a modulator.

The vac advance can go either way, manifold or secondary, depending on who you ask.

Mark
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