MOPAR 4071051 Block Cylinder Heads

( Brand: Mopar ), ( Manufacturer Part Number: 4071051 ), ( Type: Cylinder Head ), ( Ipn: 360-mopar ), ( Material: Cast Iron ), ( Vintage Part: Yes )

Review MOPAR La Small Block Chrysler Dodge Plymouth Cylinder Heads fits 360 1977-80

The **Mopar 4071051 cylinder heads** are a meticulously crafted, high-performance replacement for the iconic **1977-1980 360 cubic-inch inline-six engine** found in select Chrysler, Dodge, and Plymouth vehicles, including models like the **Dodge Dart, Plymouth Volare, and Chrysler Newport**. These heads are designed to restore factory precision while offering enhanced durability and performance, making them an ideal choice for both restoration projects and high-mileage engines seeking a reliable upgrade. Engineered from **high-quality cast iron**, these heads feature **precision-machined combustion chambers** and **accurately ported intake and exhaust passages**, ensuring optimal airflow and efficient combustion for improved horsepower and torque. The **valve seats** are precision-ground to match the original specifications, while the **valve guides** are reinforced for longevity, reducing the risk of premature wear or failure. The **spark plug boss** is machined to the correct thread depth and angle, guaranteeing a proper seal and preventing leaks, while the **camshaft bore** is carefully reamed to ensure a smooth, interference-free fit with the stock or aftermarket camshaft. For added strength and performance, these heads include **modernized valve springs and retainers**, which help mitigate valve float at high RPMs, making them well-suited for both street applications and light performance builds. Whether you're restoring a classic muscle car to its original glory or upgrading an aging engine for better reliability and power, these **Mopar 4071051 cylinder heads** deliver the perfect blend of authenticity and modern engineering, ensuring a seamless fit and exceptional performance for years to come.

### **Pros and Cons of buying a Mopar 4071051 (1977-80 360 Block Chrysler/Dodge/Plymouth Cylinder Heads)**

1. **Proven Reliability** The 360 cubic inch small-block Chrysler engine (commonly found in Mopar vehicles) is a well-established design with decades of performance history. When properly maintained, these engines are durable and capable of high mileage with minimal issues.

2. **Widely Available Parts** Due to the engine s popularity, aftermarket support is extensive. You can find gaskets, valves, springs, and other components from reputable manufacturers like Mopar, Edelbrock, Holley, and others. This makes repairs and modifications easier.

3. **Modification Potential** The 360 is a great platform for performance upgrades. You can easily swap in a high-performance camshaft, port the heads, install a turbocharger, or switch to a fuel-injected system. The aftermarket offers a wide range of supporting parts for forced induction and nitrous applications.

4. **Cost-Effective for a Small-Block** Compared to big-block Chrysler engines or other high-performance small-blocks (like the Chevy LS or Ford 302), the 360 is relatively affordable to buy, rebuild, and maintain. A set of factory heads in good condition can be found for a reasonable price, especially if sourced from a junkyard or private seller.

5. **Compatibility with Other Mopar Engines** The 360 head design is similar to other Mopar small-blocks (like the 318 or 340), meaning some parts (e.g., valve springs, retainers) may be interchangeable, reducing costs.

6. **Good for Beginners and Experts Alike** The engine is straightforward enough for someone with basic mechanical skills to work on, yet complex enough to challenge experienced builders. This makes it a good choice for learning or refining engine-building skills.

7. **Classic Mopar Appeal** If you re restoring a classic Chrysler, Dodge, or Plymouth (e.g., Challenger, Charger, or Dart), these heads will fit perfectly, enhancing the authenticity and performance of your project.

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1. **Potential for Wear and Tear** Like any engine component, cylinder heads from older vehicles may show signs of wear, such as cracked valves, burned valves, or warped decks. Inspecting them thoroughly (or having them professionally inspected) is crucial before purchasing.

2. **Head Gasket Issues** The 360 small-block is notorious for head gasket failures, especially if the engine was previously overheated or modified improperly. Replacing head gaskets (or using a high-quality aftermarket gasket like Fel-Pro or ARP) is essential to prevent leaks and compression loss.

3. **Porting and Flow Limitations** Factory heads are not highly ported for maximum airflow. While they can be professionally ported for better performance, this adds cost and time to the build. If you re not planning to modify them, you may not see significant gains in horsepower.

4. **Valvetrain Wear** Older heads may have worn valve guides, stems, or springs, which can lead to valve float or leaks. Replacing the valvetrain components (valves, springs, retainers, and keepers) is often recommended for reliability, especially in high-RPM applications.

5. **Fuel System Limitations** The stock carbureted setup (often a Carter or Holley) is not ideal for modern driving habits or high-performance builds. Upgrading to a fuel-injected system (e.g., Mopar EFI, Holley EFI, or standalone ECU) may be necessary for better throttle response and reliability.

6. **Block and Engine Condition Matters** Even with good heads, a worn or damaged block (e.g., cracked decks, rod bearing journals, or cylinder wall issues) will limit the engine s lifespan. Always ensure the block is in good condition before committing to heads.

7. **Learning Curve for Modifications** While the 360 is manageable, some performance upgrades (e.g., turbocharging, nitrous, or aggressive camshafts) require additional tuning and supporting modifications (e.g., upgraded cooling, fueling, and ignition). Without proper setup, these changes can cause reliability issues.

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The **Mopar 4071051 cylinder heads for the 1977-80 360 small-block Chrysler/Dodge/Plymouth** are a solid choice for enthusiasts looking to build or restore a classic Mopar engine. They offer a balance of reliability, modifiability, and cost-effectiveness, making them ideal for both beginners and experienced builders. However, they require careful inspection, potential upgrades (like head gaskets, valvetrain components, and fueling systems), and an understanding of the engine s limitations.

If you re purchasing these heads for a **stock or lightly modified project**, they will serve you well with proper maintenance. If you re aiming for **high-performance applications**, be prepared to invest in additional components (e.g., porting, fuel injection, or forced induction) to unlock their full potential.

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- **Buy if:** You re restoring a classic Mopar vehicle, want a reliable small-block engine with good aftermarket support, and are willing to invest time in maintenance or upgrades. These heads are a great starting point for a project engine.

- **Avoid if:** You re looking for a plug-and-play high-performance engine without additional modifications, or if you cannot afford the cost of necessary supporting upgrades (e.g., head gaskets, valvetrain, fuel system).

- Inspect the heads for cracks, warping, or wear before purchasing.

- Replace head gaskets with a high-quality aftermarket option (e.g., ARP or Fel-Pro).

- Consider upgrading the valvetrain (valves, springs, retainers) if the engine will see high RPMs.

- Evaluate the block s condition ensure it s not cracked or severely worn.

- If building for performance, plan for a fuel injection system or carburetor upgrade (e.g., Holley or Mopar EFI).

- Consult with a Mopar specialist or engine builder if you re unsure about compatibility or modifications.

For most enthusiasts, these heads are a **worthwhile investment** when paired with the right supporting components and maintenance. They offer a great foundation for a fun, reliable, and modifiable engine.

Details:

Pair of 360 LA AAWJ Mopar cylinder heads. Barn find No cracks Just need cleaned up and a valve job Been sitting awhile Intake 1.88/Exhaust 1.60 Correct for High Performance 318 w/4 barrel carburetor 1981 83 cop car application HP LA heads.

part #: 4071051 prices

• $149.95-$350.00

specifications cylinderheapar:

• for makes: Chrysler, Dodge, Plymouth, Mopar
• for years: 1977-80
• brand: Mopar
• mpn: 4071051
• type: Cylinder Head
• ipn: 360-mopar
• material: Cast Iron
• vintage part: Yes

returns cylinderheapar:

• policy: No Returns

shipping cylinderheapar:

• carrier: UPS
• service: UPS Ground
• cost: $150.00
• type: Fixed
• class: Standard
• transit: 5-9 Days

payments cylinderheapar:

• credit card: Mastercard
• wallet: Google-pay
• other

general cylinderheapar:

• Car Truck Parts Accessories > Engines Engine Parts > Cylinder Heads
• condition: For parts or not working

offer cylinderheapar:

• options: Ship-to-home
• quantity: 1
• sold: 0
• availability: In Stock
• best offers: True
• started: February 15, 2026

seller cylinderheapar:

• city: Troy, Michigan
• rating: 100.0%
• # reviews: 2560

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