HOLLEY 6R3059B Carburetor C8OF-9510-D 3796-1

( Brand: Holley ), ( Manufacturer Part Number: 6R3059B ), ( Choke Type: Non ), ( Type: Carburetor ), ( Mounting Flange Type: Square Bore ), ( Universal Fitment: No ), ( Vintage Part: Yes ), ( Country Of Origin: United States )

Review HOLLEY Carburetor Ford Mercury List fits GT390 1968

The Holley 6R3059B carburetor is a high-performance replacement option for the original carburetor on 1968 Ford Mercury GT390 models. This carburetor is specifically designed for use with engines equipped with the C8OF-9510-D 3796-1 intake manifold, providing a direct bolt-on fitment for easy installation.

The Holley 6R3059B carburetor is a 4-barrel, double pumper design, which means it utilizes two independent circuits to ensure optimal fuel delivery under various engine conditions. This design is ideal for high-performance applications where increased fuel flow is required.

The primary features of this carburetor include a unique Holley design, which integrates a high-performance bowl gasket, a high-flow fuel pump, and a unique float system. These features work together to provide improved fuel delivery, better idle stability, and more consistent fuel pressure.

The secondary features of this carburetor include a 650 CFM (cubic feet per minute) venturi size, which is suitable for engines producing up to 550 horsepower. The carburetor is also equipped with Holley's unique adjustable secondary metering blocks, which allow for fine-tuning of the secondary fuel mixture to optimize engine performance.

Additionally, the Holley 6R3059B carburetor comes with a comprehensive installation kit, which includes all necessary hardware, gaskets, and instructions to make the installation process as straightforward as possible. The carburetor is also backed by Holley's industry-leading 3-year warranty, providing peace of mind for performance enthusiasts.

In summary, the Holley 6R3059B carburetor is a high-performance replacement option for the original carburetor on 1968 Ford Mercury GT390 models. Its 4-barrel, double pumper design, unique features, and comprehensive installation kit make it an ideal choice for those seeking improved fuel delivery, better idle stability, and increased horsepower in their classic muscle car.

The Holley 6R3059B carburetor is a popular choice among Ford Mustang and Mercury Cougar enthusiasts for their 1968-1969 GT350 and GT390 models. Here are some pros and cons of buying this carburetor for a 1968 Ford Mercury GT390:

1. Holley is a reputable brand known for manufacturing high-performance carburetors.

2. This specific model, the 6R3059B, is designed for Ford applications and comes with a factory-set base circle and emulsion tube for easy installation.

3. Holley carburetors offer excellent fuel delivery, allowing for improved engine performance.

4. The carburetor comes with a one-year limited warranty.

5. It features a mechanical secondary system for better throttle response and power delivery.

1. The Holley 6R3059B is a more expensive option compared to other aftermarket carburetors.

2. Installation can be complex and time-consuming, especially for those without experience in carburetor installation.

3. The carburetor may require additional tuning to achieve optimal performance, which can add to the cost and time involved.

4. Some users have reported issues with the vacuum secondary system and the need for modifications to ensure proper function.

The Holley 6R3059B carburetor offers several advantages for those looking to upgrade their 1968 Ford Mercury GT390's fuel delivery system. These advantages include superior fuel delivery, excellent throttle response, and the reputation of the Holley brand. However, the carburetor's higher cost and potential installation and tuning challenges should be considered before making a purchase.

If you are looking to upgrade the fuel delivery system on your 1968 Ford Mercury GT390 and are willing to invest the time and resources for installation and tuning, the Holley 6R3059B carburetor is an excellent choice. However, if you are looking for a more budget-friendly option, you may want to consider other aftermarket carburetors that offer similar performance but with a lower price point. Ultimately, it's important to weigh the pros and cons carefully before making a decision.

Details:

Been sitting for decades, throttles open and close Will need to be rebuilt sure As the air hon been milled off there is no way tell exact part number however according my research it should C8OF-9510-D LIST 3796-1 which correct 68 Mustang cougar GT390 ,naturally as I cannot prove anything do your use best judgment.: Holley Carburetor 6R3059B 1968 Ford Mercury GT390 C8OF-9510-D LIST 3796-1.

part #: 6r3059b prices

• $90.00-$295.99

specifications carbcoon:

• for models: Gt390
• for makes: Ford, Mercury
• for years: 1968
• brand: Holley
• mpn: 6r3059b
• choke type: Non
• type: Carburetor
• mounting flange type: Square Bore
• universal fitment: No
• vintage part: Yes
• country of origin: United States

returns carbcoon:

• policy: No Returns

payments carbcoon:

• other
• credit card: Mastercard
• wallet: Apple-pay

general carbcoon:

• condition: Used
• Car Truck Parts Accessories > Air Fuel Delivery > Carburetors

seller carbcoon:

• city: Granada Hills, California
• rating: 98.8%
• # reviews: 3870

offer carbcoon:

• options: Ship-to-home
• started: March 26, 2026
• sold: 0
• availability: In Stock
• quantity: 1
• best offers: True

shipping carbcoon:

• service: Standard
• class: Standard
• transit: 4-8 Days
• cost: $17.95
• type: Fixed

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