HOLLEY 3966 Carburetor Single Barrel

( Brand: Holley ), ( Manufacturer Part Number: 3966 ), ( Type: Carburetor ), ( Items Included: Gasket ), ( Material: Alloy ), ( Vintage Part: Yes ), ( Choke Type: Thermostatic ), ( Oe/oem Part Number: 3190582 ), ( Features: Down Draft ), ( Universal Fitment: No ), ( Country Of Origin: United States )

Review HOLLEY Rebuilt Carburetor Single Barrel List Amc fits 1931–1968

The Holley 3966 carburetor is a classic single barrel design, specifically engineered for applications requiring a vintage look and reliable performance. This carburetor was originally designed for use on 1931 Ford Model A hot rods but has since gained popularity among enthusiasts restoring or building 1968 AMC vehicles.

The 3966 carburetor features a 1-barrel design with a square bore, making it an ideal choice for engine sizes ranging from 226 to 304 cubic inches. It's constructed from high-quality aluminum, ensuring durability and longevity. The carburetor comes with a 500 CFM venturi, which provides an excellent balance between power and fuel efficiency.

The Holley 3966 carburetor is equipped with a Holley's classic blue bowl gasket and a brass float. The float is adjustable via a screw located on the top of the float bowl, allowing users to fine-tune the fuel mixture according to their engine's specific requirements. The carburetor also includes a manual choke system, which can be activated by pulling a lever located on the left side of the carburetor.

One of the standout features of the 3966 carburetor is its adjustable secondary emulsion system. This feature allows for precise tuning of the secondary circuit, ensuring optimal engine performance under various driving conditions. The secondary emulsion system is controlled by two adjustable screws located on the top of the carburetor.

Another notable feature is the carburetor's threaded Shock Tower Mounting System. This system allows for easy mounting of the carburetor to the intake manifold, ensuring a secure and vibration-free installation. The carburetor also includes a gasket for the shock tower mounting system, making installation even more straightforward.

The Holley 3966 carburetor comes with a 6-71 intake manifold adapter, making it compatible with a wide range of applications. The intake manifold adapter is bolt-on and requires no modifications for installation. Additionally, the carburetor includes a set of mounting hardware, making it a complete solution for those looking to install a vintage-style carburetor on their 1968 AMC vehicle.

In summary, the Holley 3966 carburetor is a reliable and high-performing vintage single barrel carburetor designed for applications requiring a classic look and dependable fuel delivery. Its adjustable secondary emulsion system, threaded shock tower mounting system, and ease of installation make it a popular choice among hot rod and restoration enthusiasts.

The Holley 3966 carburetor is a single barrel model that was originally designed for use on 1931 Ford flathead engines, but it has since been adapted for use on other applications, including the 1968 AMC engines. Here are some potential pros and cons of buying this carburetor:

1. Authentic Look: This carburetor offers an authentic vintage look that is highly desirable for many classic car enthusiasts.

2. Adaptability: The Holley 3966 carburetor has been adapted for use on a wide range of engines, including the 1968 AMC engine, making it a versatile option.

3. Performance: Holley carburetors are known for their excellent performance and reliability, and the 3966 model is no exception.

4. Customization: Holley offers a wide range of customization options for this carburetor, allowing you to tailor it to your specific engine and performance needs.

5. Support and Community: Holley has a large and active community of users, which can be a valuable resource for troubleshooting and getting advice on tuning and performance.

1. Complexity: Older carburetors like the Holley 3966 can be more complex to install and tune than modern fuel injection systems.

2. Maintenance: Older carburetors require more frequent maintenance than modern fuel injection systems, including regular adjustments and rebuilds.

3. Cost: Holley carburetors can be more expensive than some other options on the market, especially when you factor in the cost of customization and maintenance.

4. Compatibility: While the Holley 3966 carburetor has been adapted for use on a wide range of engines, it may not be compatible with all applications, so it's important to verify that it's a good fit for your specific engine before making a purchase.

The Holley 3966 carburetor offers a unique look, excellent performance, and a large community of users who can provide support and advice. However, it can also be more complex and costly to install and maintain than modern fuel injection systems. Ultimately, whether or not this carburetor is right for you will depend on your specific needs, budget, and performance goals.

If you're looking for a vintage look and are willing to invest in the customization, maintenance, and installation of an older carburetor like the Holley 3966, then it could be a great choice for your 1968 AMC engine. However, if you're looking for a more convenient and cost-effective option, you may want to consider a modern fuel injection system instead. Ultimately, the decision is yours, and it's important to weigh the pros and cons carefully before making a purchase.

Details:

It is in IMMACULATE condition, as you can see the many photos.

part #: 3966 prices

• $51.00-$67.00

specifications carbcoon:

• for makes: Amc
• for years: 1931-1968
• brand: Holley
• mpn: 3966
• type: Carburetor
• items included: Gasket
• material: Alloy
• vintage part: Yes
• choke type: Thermostatic
• oe/oem part number: 3190582
• features: Down Draft
• universal fitment: No
• country of origin: United States

payments carbcoon:

• wallet: Google-pay
• other
• credit card: Diners-club

general carbcoon:

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

shipping carbcoon:

• service: USPS Ground Advantage
• carrier: USPS
• transit: 5-11 Days
• class: Standard
• cost: $20.00
• type: Fixed

returns carbcoon:

• policy: No Returns

seller carbcoon:

• # reviews: 167
• rating: 100.0%
• city: Janesville, Wisconsin

offer carbcoon:

• started: February 21, 2026
• quantity: 1
• options: Ship-to-home
• sold: 0
• availability: In Stock

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