HOLLEY 6743 Carburetor Carb 4150-G 4-BARREL

( Brand: Holley ), ( Manufacturer Part Number: 6743 ), ( Type: Governor )

Review HOLLEY 4-barrel Carburetor Carb Chevrolet Chevy Gmc Truck fits 427 1974

Holley 6743 4150-G 4-Barrel Carburetor - Ideal Match for 1974 Chevrolet, Chevy, and GMC 427 Engines

The Holley 6743 4150-G 4-Barrel Carburetor is a high-performance, street-legal carburetor designed specifically for 1974 Chevrolet, Chevy, and GMC vehicles equipped with 427 cubic inch engines. This carburetor is an excellent upgrade for enthusiasts seeking improved throttle response, increased fuel efficiency, and enhanced power output.

The Holley 4150-G series carburetor is renowned for its durability, and the 6743 model is no exception. It features a heavy-duty cast aluminum base, which resists warping and ensures a stable foundation for your engine. The barrels are made of billet aluminum, providing superior flow characteristics and excellent heat dissipation.

This carburetor is equipped with 1.7:1 secondary venturis, which offer optimal air/fuel mixture distribution for large displacement engines. The primary venturis measure 4150 cfm at 700 RPM, ensuring ample fuel delivery to support the engine's power requirements.

The Holley 6743 4150-G carburetor boasts a unique, easy-to-tune design. It comes with a Holley Synergy Base and matching Holley Synergy Fuel Pressure Regulator. The Synergy System allows for precise fuel pressure tuning and automatic compensation for altitude and temperature changes, making it an ideal choice for those seeking optimal engine performance in various conditions.

Additionally, the carburetor features a built-in electric choke, eliminating the need for a separate vacuum or mechanical choke system. This simplifies wiring and installation, making it an excellent choice for both restoration projects and performance builds.

The Holley 6743 4150-G 4-Barrel Carburetor is compatible with various engine management systems, such as Holley EFI, MSD, and others. This flexibility makes it an attractive option for enthusiasts looking to marry classic style with modern technology.

In summary, the Holley 6743 4150-G 4-Barrel Carburetor is a high-quality, durable, and versatile upgrade for 1974 Chevrolet, Chevy, and GMC 427 engines. It delivers improved throttle response, increased fuel efficiency, and enhanced power output, making it an essential tool for those seeking to optimize their engine's performance.

The Holley 6743 4150-G 4-barrel carburetor is a popular choice for restoring or upgrading the fuel delivery system of a 1974 Chevrolet, Chevy, or GMC 427 engine. This carburetor comes with several advantages and disadvantages that are essential to consider before making a purchase.

1. High Flow Design: The Holley 4150 series carburetors are known for their high flow design, making them ideal for high-performance applications. This can lead to increased horsepower and torque.

2. Easily Adjustable: Holley carburetors are known for their ease of adjustability. This carburetor comes with a full range of adjustments, allowing you to fine-tune the fuel mixture for optimal engine performance.

3. Durable Construction: The Holley 6743 4150-G carburetor is constructed of high-quality materials, including billet aluminum and stainless steel components. This makes it a durable option for long-term use.

4. Improved Air/Fuel Mixture: This carburetor utilizes Holley's proven vacuum secondary system, which improves the air/fuel mixture at higher RPMs, resulting in better combustion and improved engine performance.

1. Complexity: Holley carburetors are known for their complexity. Installing and tuning this carburetor may require a significant amount of time and expertise.

2. Cost: The Holley 6743 4150-G carburetor is a premium option, and its cost may be a deterrent for some buyers.

3. Requires Tuning: Properly tuning this carburetor to work efficiently with your engine may require professional help, which can add to the overall cost.

The Holley 6743 4150-G 4-barrel carburetor offers several advantages, including high flow design, ease of adjustability, durable construction, and improved air/fuel mixture. However, its complexity, cost, and the need for professional tuning may be disadvantages for some buyers.

If you are looking for a high-performance carburetor for your 1974 Chevrolet, Chevy, or GMC 427 engine and are willing to invest the time and resources into its installation and tuning, the Holley 6743 4150-G carburetor can be an excellent choice. However, if you are looking for a more cost-effective or easier-to-install option, you may want to consider other carburetor brands or models.

Details:

Vent tube casting has a crack in it. Core for rebuilding or parts. Carb is clean, possibly has been rebuilt. Holley 4150-G 4-barrel carburetor, list number 6743.

See pics for condition. Please verify pics match your application. Linkage moves free.

part #: 6743 prices

• $50.00-$139.99

specifications carbcoon:

• for models: 427
• for makes: Chevrolet, Chevy, Gmc
• for years: 1974
• brand: Holley
• mpn: 6743
• type: Governor

general carbcoon:

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

returns carbcoon:

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

offer carbcoon:

• started: April 22, 2025
• sold: 0
• availability: In Stock
• quantity: 1
• best offers: True
• options: Ship-to-home

payments carbcoon:

• credit card: Discover
• wallet: Paypal
• other

shipping carbcoon:

• cost: $30.75
• transit: 4-10 Days
• carrier: USPS
• type: Calculated
• service: USPS Ground Advantage
• class: Standard

seller carbcoon:

• city: Sheboygan Falls, Wisconsin
• # reviews: 29981
• rating: 100.0%

Holley 6743 Is Similar To:

• Holley 4557 Ls6 L78 396 454 Carburetor 3967477-gg 1970 Chevelle Camaro Nova (53.6% similar) She was removed off of a running BBC motor but has been sitting for few months. It has not been tested and could possibly need work, labor, other parts/materials before use. May be shipped via ups, USPS or FedEx. The base plate was replaced. Selling an oem Holley list 4557 carburetor with...(May 17th, 2024)
• Holley 3886091 L-88 427 Corvette Carb 3886091an (33.6% similar) 427 L-88 corvette carburetor.holley 780 .part number 388-6091 an ,work great...(May 17th, 2024)
• Holley 10741 Teapot 4000 4-barrel Carburetor 1074-1 Core 1955 Ford Thunderbird 292 V-8 (54.9% similar) Ford part number EYCK-9510-T. Holley teapot 4000 4-BARREL carburetor, list number 1074-1. Please verify part number and pictures match your application. Linkage moves free. See pics for condition. Carb core appears to be mostly complete. Core for rebuilding or parts...(May 17th, 2024)
• Holley 1920 Vintage Glass Bowl Carburetor Hot Rod Gasser Carb Core Rebuild (44.7% similar) Good condition all linkage moves as it should great for rebuild...(May 17th, 2024)
• Holley 06425c Two Barrel 650cfm Carburetor 6425 Imca Cheater Outlaw Racing Core (44.6% similar) Rare Holley two barrel carburetor, list number 6425 - carb is together with choke removed but horn intact metering block also in very nice physical condition, all linkage moves freely kick down arm as well good overall core condition has been sitting fryers it should base and bores look...(May 17th, 2024)
• Holley Ecz-9510-m Teapot 4000 4-barrel Carburetor 1161-2 Carb 1956 Ford Thunderbird 312 V-8 (53.3% similar) Carb core appears to be mostly complete. Core for rebuilding or parts. Holley teapot 4000 4-BARREL carburetor, list number 1161-2. Please verify part number and pictures match your application. See pics for condition. Ford part number CZ-9510-M. Linkage moves free...(May 18th, 2024)
• Holley R3310-1 Carburetor List-3310-1 780cfm H4-4150 4bbl Carb Ford Chevy Bop Mopar (47.2% similar) Used Holley 780 cfm 4BBL carburetor. Being sold for parts, restoration, core, rebuild. Looks to be complete, no cracks, being sold as/is. LIST-3310-1, date, 0653...(May 18th, 2024)
• Holley 3972121 4555 Carb 1970 Lt1 Corvette And Camaro Z28 4 Speed 904 Oct 1969 Restored (37.6% similar) Part #: Holley 3972121 for sale...(May 18th, 2024)
• Holley 3969898-gr 4492 Carb 9b2 Dec 69 1970 454 Ls6 396 L78 Automatic Chevelle Camaro Nova (40.5% similar) Part #: Holley 3969898-GR for sale...(May 18th, 2024)
• Holley 1850-3 Carburetor 4 Barrel 600 Cfm Vac Secondary Nice Rebuildable Core (43.9% similar) Many of the carbs have been rebuilt and were sitting in plastic bags, but I no history on what was done to them. It is missing a part of the electric choke. Very nice and clean vintage. Spectre fuel system accessory carburetor. The rest of it looks complete. 600 cfm vac...(May 19th, 2024)
• Holley 4360 Economaster 450 Cfm Carburetor 7454 Quadrajet Replacement Chevrolet (48.4% similar) List number is 7454. For sale is one 1 used Holley 4360 series 450 cfm spread bore carburetor. Verify it will fit your application prior to purchasing. Please look closely at all the pictures for condition and details. The carb is in poor shape and for parts only...(May 19th, 2024)