ROCHESTER 7045123 Carburetor 2-BARREL 2GC

( Brand: Rochester ), ( Manufacturer Part Number: 7045123 ), ( Type: Carburetor )

Review ROCHESTER 2-barrel Carburetor 2gc Chevrolet Chevy Gmc Truck fits 305 350 1975

The Rochester 7045123 2-barrel carburetor is a classic automotive component designed for use in 1975 Chevrolet, Chevy, and GMC vehicles equipped with 305 or 350 cubic inch V8 engines. This carburetor, part of the 2GC series, delivers reliable and efficient fuel delivery for an optimal driving experience.

Measuring approximately 25 inches long, 15 inches wide, and 11 inches high, this 2-barrel carburetor features a unique design that allows for a balanced fuel mixture for smooth engine performance. The carburetor body is made of durability cast aluminum, ensuring it can withstand the rigors of regular use.

The Rochester 7045123 carburetor comes with two 1-barrel-style throttle bodies, each equipped with a choke mechanism for easy starting in cold weather conditions. The throttle bodies are adjustable, allowing you to fine-tune the air-fuel mixture for optimal engine performance.

This carburetor includes a primary and a secondary metering block, which control the fuel flow into the engine. The primary metering block delivers fuel to the engine during idle and low-load conditions, while the secondary metering block supplies fuel during high-load conditions, such as acceleration.

The Rochester 7045123 2-barrel carburetor also features an electric choke system, which can be controlled using a dashboard switch. This system ensures a quick and easy start, even in cold weather.

The carburetor comes with a new gasket set, making installation a straightforward process. The kit includes all necessary hardware for installation, ensuring a secure and reliable fit.

In summary, the Rochester 7045123 2-barrel carburetor is a durable, reliable, and efficient fuel delivery system designed specifically for 1975 Chevrolet, Chevy, and GMC vehicles with 305 or 350 cubic inch V8 engines. Its adjustable throttle bodies, electric choke system, and inclusion of a new gasket set make it an excellent choice for those seeking to restore or maintain their classic vehicle's original performance.

Pros and Cons of Buying a Rochester 2-Barrel Carburetor (4157) for a 1975 Chevrolet, Chevy, or GMC with a 305 or 350 Engine

This analysis considers the advantages and disadvantages of purchasing a Rochester 2-Barrel Carburetor (Model 4157) for a 1975 Chevrolet, Chevy, or GMC vehicle with a 305 or 350 engine.

1. Original Equipment: This carburetor is an original equipment manufacturer (OEM) part, ensuring compatibility and a precise fit for your vehicle.

2. Fuel Efficiency: The Rochester 2-Barrel Carburetor is known for its excellent fuel efficiency, which can lead to cost savings in the long run.

3. Reliability: With a solid reputation for durability and reliability, this carburetor can provide dependable performance for many miles.

4. Availability: Widely available through various automotive parts suppliers, this carburetor can be easily sourced for replacement or restoration projects.

5. Support and Resources: Rochester Carburetor offers technical support and resources, making it easier to diagnose and address any potential issues.

6. Performance: The 2-Barrel design delivers a balanced power band, providing a responsive driving experience.

1. Complexity: Compared to modern fuel injection systems, carburetors can be more complex and require more maintenance, including regular tuning and adjustments.

2. Emissions: Older carburetors, such as the Rochester 2-Barrel, may not meet modern emission standards, which could result in additional costs or modifications for those living in areas with strict regulations.

3. Fuel Economy: While the Rochester 2-Barrel Carburetor offers good fuel efficiency, it may not match the fuel economy of modern engines and fuel injection systems.

4. Cold Start Performance: In colder temperatures, the carburetor may require additional tuning to ensure consistent starting and smooth idling.

The Rochester 2-Barrel Carburetor (Model 4157) offers numerous advantages, including original equipment compatibility, fuel efficiency, reliability, availability, support resources, and performance. Simultaneously, it presents some challenges, such as complexity, emission concerns, and cold start performance. Ultimately, the decision to purchase this carburetor depends on your priorities, budget, and specific requirements for your 1975 Chevrolet, Chevy, or GMC vehicle with a 305 or 350 engine.

If you prioritize originality, reliability, and performance, the Rochester 2-Barrel Carburetor (Model 4157) is an excellent choice for your 1975 Chevrolet, Chevy, or GMC vehicle. However, if you prefer modern fuel economy, ease of use, or emission compliance, you might consider exploring alternative fuel injection systems or modern carburetors designed to address these concerns.

Details:

Carb core appears to be mostly complete. Linkage moves free. Throttle bores measure 1-11/16 and base mounting bolt pattern to measures 2 by 3-5/8. Rochester 2-Jet 2GC 2-barrel carburetor, stamp number 7045123.

Core for rebuilding or parts. See pics for condition. Please verify part number and pics match your application.

part #: 7045123 prices

• $50.00-$54.00

specifications carbcoon:

• for models: 305, 350
• for makes: Chevrolet, Chevy, Gmc, Rochester
• for years: 1975
• brand: Rochester
• mpn: 7045123
• type: Carburetor

seller carbcoon:

• city: Sheboygan Falls, Wisconsin
• # reviews: 32947
• rating: 100.0%

payments carbcoon:

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

offer carbcoon:

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

returns carbcoon:

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

general carbcoon:

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

shipping carbcoon:

• cost: $0.00
• class: Standard
• carrier: USPS
• service: USPS Ground Advantage
• transit: 3-7 Days
• type: Calculated

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