How to Install an Edelbrock 1406 on a Ford 390
The model 1406 Edelbrock carburetor is a four-barrel automotive carburetor designed to flow up to 600 cubic feet per minute of air and fuel. The Ford 390 V-8 engine was initially designed as a high-performance engine in the 1960s, but it was relegated mostly to Ford's pickup line by the 1970s.
Replacing the stock carburetor with the 1406 will result in noticeable power gains and, in some cases, will increase gas mileage. Due to the basic designs of the 390 and the 1406, installing the carburetor is a fairly straightforward process.
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Instructions
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1
Start the engine and pull the distributor's vacuum hose off of the stock carburetor. The vacuum hose attaches to a disk-shaped canister on the side of the distributor.
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2
Press one finger over the carburetor port to which the vacuum hose was attached. If you feel vacuum, the distributor's vacuum hose will be attached to the driver's side vacuum port on the front of the Edelbrock carburetor. If no vacuum is felt, the hose will be attached to the passenger's side port.
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3
Turn the engine off and allow it to cool.
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4
Disconnect the negative battery cable with a wrench.
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5
Disconnect the throttle linkage rod from the side of the stock carburetor. The rod is held against the carburetor's throttle linkage with a clip. Pull the clip away from the tip of the carburetor with pliers.
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6
Remove the PCV hose, the power brake hose (if so equipped) and the fuel hose from the carburetor. Loosen the hose clamps with a screwdriver and pull the hoses away from the carburetor. Place a rag underneath the fuel hose before removing it to avoid spilling gasoline onto the engine.
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7
Remove the carburetor's four mounting nuts with a wrench and lift the carburetor off of the intake manifold, then remove the old carburetor gasket.
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8
Lower a new carburetor gasket over the carburetor's mounting studs and onto the intake manifold and position the carburetor.
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9
Tighten the carburetor's four mounting nuts onto the carburetor studs with a wrench.
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10
Press the power brake hose onto the fitting on the back of the carburetor and tighten the hose clamp with a screwdriver. Press a supplied rubber pipe plug onto the fitting if the vehicle is not equipped with power brakes.
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11
Press the fuel hose onto the fitting at the rear corner of the driver's side of the carburetor and tighten the hose clamp.
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12
Press the PCV hose onto the large fitting on the front of the carburetor and tighten the hose clamp.
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13
Press the distributor vacuum hose onto either the right or the left fitting on the front of the carburetor, as determined in Step 2. Press a supplied rubber pipe plug onto the unused fitting.
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14
Insert the throttle linkage rod into the throttle linkage and secure the rod in place with the rod's clip.
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15
Tighten the negative battery cable onto the battery.
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16
Start the engine and turn the idle screw with a screwdriver until the desired idle speed is reached. The idle screw is located on the driver's side of the carburetor. The base of the screw rests against the throttle linkage. Turn the screw in a clockwise direction to increase the idle speed and in a counterclockwise direction to decrease the idle speed.
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