Holley Carburetor P/N 0-7448, 0-4412C, & 0-4412S Installation, Tuning and Adjustment Manual

These instructions must be read and fully understood before beginning installation. If this manual is not fully understood, installation should not be attempted. Failure to follow these instructions, including the pictures may result in subsequent system failure.
NOTE: The 0-7448, 0-4412C, and 0-4412S are designed as a universal-type, 2-barrel carburetors. These model 2300 carburetors bolt directly to most Ford 2 barrel V-8 manifolds.
NOTE: These carburetors are not designed to meet any emission requirements for 1968 and later applications. Therefore, they should be used only for competition/off road vehicles or vehicles not required to comply with late model exhaust emission standards.
WARNING: If you are using this carburetor with a GM overdrive transmission TH700R4 or a TH200R4, you must use a transmission kickdown cable bracket (Holley P/N 20-95) and stud (Holley P/N 20-40). Otherwise, SEVERE transmission damage WILL result. This carburetor is not designed to work with ANY other automatic overdrive transmission.
REMOVAL: 1. Remove the air cleaner, exercising care to detach any vacuum lines from the air cleaner without damage. Note the original locations so they can be reassembled to the air cleaner in the same manner.
2. Remove the existing carburetor by the following procedure:
- Carefully disconnect the fuel line.
WARNING: Carefully protect the open end of the fuel lines, so that no foreign particles can enter. Wrap the end of the fuel line with a clean lint-free cloth.
- Disconnect and mark all vacuum lines and wiring (if any) to the carburetor.
- Disconnect the PCV hose.
- Disconnect the choke rod or heat tubes (if equipped).
- Disconnect and remove the throttle linkage and automatic kickdown linkage. Save all retaining clips.
- Unbolt and remove the carburetor from the manifold. Use care not to let anything (i.e. old gasket material) fall into the intake manifold.
- Lay a clean cloth across the intake manifold opening to guard against any foreign matter entering the intake manifold.
3. If the intake manifold is being changed at this time, install the new manifold according to the manifold’s manufacturer’s directions. Since we are not familiar with all manifold instructions, Holley cannot accept responsibility for their validity.
INSTALLATION NOTES: CHRYSLER APPLICATIONS
WARNING: This carburetor is not designed for use with any Chrysler automatic overdrive transmission. SEVERE transmission damage may result from improper application use.
1. Unless you are replacing an existing Holley carburetor (which already has a lever extension arm), you may need to purchase and install a throttle lever extension (Holley P/N 20-7) on the carburetor. Remove the throttle stud and nut from the original carburetor. You can purchase a new stud from your Holley dealer (Holley P/N 20-36). Install the stud in the throttle extension lever.

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