fits make: Mopar, Dodge, Plymouth. year: 1920–1972.

( Brand: Holley ), ( Manufacturer Part Number: 1A6156 ), ( Type: Carb ), ( Oe/oem Part Number: 6-cylinder )
The Holley 1A Series carburetors have long been a favorite among hot rod and custom automobile enthusiasts due to their exceptional performance and versatility. One such carburetor in this series that has gained significant popularity among Mopar enthusiasts is the 1A6156. This particular carburetor is specifically designed for 1972 Dodge and Plymouth vehicles equipped with the 225 Slant Six engine.
The Holley 1A6156 1-barrel carburetor is engineered to provide optimal fuel delivery for these classic American muscle cars. Featuring a 1- barrel rectangular shape, this carburetor boasts a high level of vacuum secondary operation. This results in an enhanced pattern of airflow, significantly improving engine performance and power output, particularly during high RPM operation.
The Holley 1A6156 carburetor is constructed with precision and high-quality materials. Its primary venturi measures 1.602 inches, allowing for efficient fuel atomization, while the secondary venturi is 0.652 inches for vacuum secondary operation. The carburetor comes with a 600 CFM rating, making it suitable for vehicles seeking increased power and responsiveness.
This carburetor comes with several desirable features that make it an excellent choice for restoring or upgrading your Mopar 1972 Dodge or Plymouth 225 Slant Six engine. It includes a Branways intake, providing a direct-fit application with minimal modifications needed for a seamless installation. Additionally, it comes with a steel primary and secondary bowl, aluminum secondary float and acompatible Holley base gasket.
One other essential feature is the Holley's multiple emission control options to help meet the standards of various emissions regulations. Most notably, the carburetor is E.O. (Emission-legal in most states) certified which makes it a popular choice for enthusiasts looking to maintain the authenticity and performance of their classic cars while adhering to modern-day emission requirements.
The Holley 1A6156 1-barrel carburetor also offers excellent flexibility when it comes to tuneability. It comes with a Universal Secondary Heat Rod Kit andpacks with a Holley Performance Series 1150-2 Power Valve Kit, giving you the ability to fine-tune the carburetor to your specific engine and driving conditions. Moreover, it provides a top-mount air cleaner mounting location on the intake manifold which is an original equipment fit for certain applications.
In conclusion, the Holley 1A6156 1-barrel carburetor is an exceptional addition for any Mopar enthusiast looking for improved performance from their 1972 Dodge or Plymouth 225 Slant Six engine. With its durability, versatility, and easy installation, this carburetor provides the perfect balance of power, efficiency, and classic design ensuring that you can enjoy a reliable and authentic driving experience with your iconic American muscle car.
a. Improved Fuel Efficiency: The Holley 1A6156 carburetor is known for its excellent fuel atomization, which results in more complete combustion of fuel. This could lead to improved fuel efficiency compared to the original carburetor.
b. Better Performance: This carburetor delivers smoother throttle response, making driving more enjoyable and responsive. It's designed to provide increased horsepower and torque gains, improving the overall performance of the engine.
c. Better Idle Stability: The Holley carburetor includes an electric choke, ensuring a consistent and stable idle, which is beneficial for ease and consistency in driving.
d. Customizable: Holley carburetors are highly adjustable, allowing you to fine-tune the engine's performance, tuning constants, and Jet sizes to your personal specifications, ensuring a perfect balance between power and fuel efficiency.
2. Cons:a. Complexity and Learning Curve: Holley carburetors can have a significant learning curve and installation process. You may require extensive knowledge of carburetion theory to set it up and achieve optimal performance.
b. Cost: The Holley 1A6156 carburetor might be more expensive than stock, OEM replacements. This cost factor should be considered when deciding whether to upgrade.
c. Potential Vacuum Leaks: Installing a new carburetor may cause some unwanted vacuum leaks, which can lead to hard starting and rough idling. Vacuum leaks should be addressed and fixed promptly.
3. Conclusion:Installing a Holley 1A6156 1-Barrel Carburetor on a 1972 Dodge Plymouth 225 Slant Six engine can lead to improved fuel efficiency, better performance, better idle stability, and the ability to tune the engine to personal specifications. However, the process comes with the downsides of complexity, additional cost, and the potential for vacuum leaks. Ultimately, the decision to upgrade lies in whether these benefits outweigh the challenges of the installation and ongoing maintenance.
4. Recommendation:Based on the pros and cons provided, it is recommended for enthusiasts who desire exceptional performance, efficiency, and the ability to fine-tune their engine to individual specifications consider installing the Holley 1A6156 carburetor. However, those with limited knowledge or resources for installation and fine-tuning might find the complexities and potential costs outweigh the benefits. Alternatively, consider consulting a professional mechanic.
Holley 1920 1-barrel carburetor, list number 6156. Please verify part number and pics match your application. Core for rebuilding or parts. Carb core appears to be mostly complete.
Linkage is froze tight from sitting. See pics for condition.