HOLLEY 7942 Nos Carburetor Gm 1-BARREL 6-CYLINDER

( Brand: Holley ), ( Manufacturer Part Number: 7942 ), ( Type: Rochester Monojet Replacement Carb ), ( Oe/oem Part Number: Chevrolet Oldsmobile Olds Pontiac )

Review HOLLEY New Nos 1-barrel Carburetor Gm Chevy Buick 6-cylinder fits 250 1940–1976

The Holley 7942 NCSU 1940 1-barrel carburetor is a renowned performance upgrade for the 1976 Chevrolet and Buick 250 6-cylinder engines. This carburetor is engineered to deliver superior throttle response, fuel economy, and power. Let's explore its unique features in detail.

The Holley 7942 carburetor boasts a traditional 1-barrel design, which is simple yet effective in delivering a consistent fuel mixture to the engine. The 1940 series carburetor is specifically designed for applications that require a balance between power and economy. This makes it an excellent choice for daily drivers and performance enthusiasts alike.

One of the key features of this carburetor is its vacuum secondary system. This system utilizes a secondary throttle plate that is linked to the engine vacuum. When vacuum is present, the secondary throttle plate opens, providing additional fuel for increased power. This system is particularly beneficial for applications where low-end torque and high-RPM power are desired.

Another notable feature is the Holley's proven adjustable choke system. This system ensures a quick and easy starting process, even in cold weather conditions. The choke can be easily adjusted to provide the optimal amount of fuel for a smooth start-up.

The Holley 7942 carburetor also comes with a 600 CFM airflow rating, making it suitable for a wide range of applications. The carburetor body is constructed from high-quality aluminum, which is both lightweight and durable. The bowl and float are made from billet aluminum, ensuring precise fuel metering and long-lasting performance.

The Holley 7942 carburetor features a 1.25-inch primary bore and a 0.525-inch secondary bore. This bore size is optimized for the 250 6-cylinder engine, providing excellent fuel atomization and efficient combustion. The carburetor also comes with a 370-degree flange, which is compatible with most aftermarket intake manifolds.

Installation of the Holley 7942 carburetor is relatively straightforward. The carburetor comes with a new gasket, making the installation process mess-free. The kit also includes a new accelerator cable bracket and an accelerator cable, ensuring a hassle-free installation experience.

In conclusion, the Holley 7942 NCSU 1940 1-barrel carburetor is an excellent performance upgrade for the 1976 Chevrolet and Buick 250 6-cylinder engines. Its traditional 1-barrel design, vacuum secondary system, adjustable choke, and 600 CFM airflow rating make it a versatile and powerful carburetor option. With its durable construction, easy installation, and proven performance, the Holley 7942 carburetor is a must-have for any enthusiast looking to enhance the performance of their classic ride.

The Holley 7942 NC (no-sync) 1-barrel carburetor is a popular choice among automotive enthusiasts for restoring or upgrading 1970s GM 1-barrel carbureted engines, including the 1976 Chevy Buick 250 6-cylinder. Here are some potential pros and cons to consider before making a purchase:

1. Holley carburetors are known for their high-performance capabilities and durability.

2. The 7942 NC model is designed to fit and function with 1970s GM 1-barrel carbureted engines.

3. Holley offers various customization options, such as different air filters, fuel bowls, and jets, to meet the specific needs of your engine.

4. The carburetor comes with a 2-year limited warranty for peace of mind.

5. Holley carburetors can potentially improve engine performance and fuel efficiency.

1. The Holley 7942 NC carburetor may require more tuning and adjustment than stock carburetors, which could be a challenge for some DIYers.

2. The cost of the carburetor and any necessary customizations could be higher than the cost of a stock carburetor.

3. Installing a new carburetor can be a complex process that requires some mechanical knowledge and experience.

4. The carburetor may not be compatible with certain emission control systems or catalytic converters, which could require additional modifications or the purchase of additional parts.

In conclusion, the Holley 7942 NC carburetor can be an excellent choice for those looking to upgrade or restore the carbureted engine in their 1976 Chevy Buick 250 6-cylinder. Its high-performance capabilities and durability make it a popular choice among automotive enthusiasts. However, it may require more tuning and adjustment than a stock carburetor, and the cost could be higher. Ultimately, the decision to purchase a Holley carburetor depends on your budget, mechanical skills, and desired level of performance.

If you are looking to improve the performance and durability of your 1976 Chevy Buick 250 6-cylinder engine and have the necessary mechanical skills and budget, the Holley 7942 NC carburetor could be a great investment. However, if you are unsure about the installation process or have limited mechanical experience, it may be worth considering hiring a professional mechanic or seeking additional resources and guidance before making a purchase. Additionally, be sure to carefully consider any necessary customizations and compatibility issues before making a final decision.

Details:

Older NOS carburetor is dusty/dirty and shows some patina from handling sitting on the shelf. May need a light cleaning/freshen before use. Hardware kit was open, might be missing a piece or two. Replaces Rochester Monojet 1-barrel carb on 1976 GM 250 6-cylinder.

Please verify part number and pics match your application. See pics for condition. New NOS Holley model 1940 1-barrel carburetor, list number 7942.

part #: 7942 prices

• $73.00-$76.00

specifications carbcoon:

• for models: 250
• for makes: Chevy, Buick
• for years: 1940-1976
• brand: Holley
• mpn: 7942
• type: Rochester Monojet Replacement Carb
• oe/oem part number: Chevrolet Oldsmobile Olds Pontiac

offer carbcoon:

• options: Ship-to-home
• quantity: 1
• best offers: True
• availability: In Stock
• sold: 0
• started: September 20, 2025

shipping carbcoon:

• type: Calculated
• carrier: USPS
• class: Standard
• service: USPS Ground Advantage
• transit: 4-10 Days
• cost: $0.00

seller carbcoon:

• city: Sheboygan Falls, Wisconsin
• # reviews: 31126
• rating: 100.0%

general carbcoon:

• condition: For parts or not working
• Car Truck Parts Accessories > Air Fuel Delivery > Carburetors

returns carbcoon:

• time: 30 Days
• paid by: Buyer
• policy: Returns Accepted

payments carbcoon:

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

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