MOPAR 68333007AC Engine Cylinder Head

( Manufacturer Part Number: 68333007AC ), ( Manufacturer Warranty: 1 Year ), ( Core Charge: 250.00 Which Is Included In The Total Price ), ( Type: Engine Cylinder Head )

Review MOPAR Engine Cylinder Head

The **Mopar 68333007AC Engine Cylinder Head** is a precision-engineered component designed exclusively for Chrysler s legendary 318 cubic-inch inline-six (LA-series) engines, a workhorse known for its durability and reliability in both classic muscle cars and modern applications. Crafted from high-quality cast iron, this cylinder head is built to exacting standards, ensuring optimal performance, longevity, and compatibility with a wide range of vehicles, including iconic models like the Dodge Dart, Plymouth Valiant, and Chrysler 300 series from the late 1960s through the early 1970s. The head features a robust, ribbed design that maximizes structural integrity while minimizing weight, allowing for efficient heat dissipation and reduced thermal stress during high-performance or heavy-duty operation. Its machined surfaces, including the combustion chambers and valve seats, are meticulously finished to promote smooth airflow and efficient combustion, contributing to improved horsepower and torque output. The head is equipped with standard-sized intake and exhaust ports, optimized for optimal cylinder filling and exhaust scavenging, which enhances both power delivery and fuel efficiency. Additionally, the integrated valve guide and seat inserts are precision-ground to ensure a tight seal, reducing the risk of blow-by and maintaining compression integrity over extended use. Whether restoring a vintage muscle car to its original glory or upgrading a modern project vehicle, this cylinder head delivers a perfect blend of heritage engineering and modern reliability, making it an essential component for enthusiasts seeking both performance and authenticity.

**Pros and Cons of Buying a Mopar 68333007AC Engine Cylinder Head**

The **Mopar 68333007AC** is a cylinder head designed for certain Chrysler V8 engines, particularly those from the **318, 360, and 400** series. Below is a detailed breakdown of its advantages and disadvantages, followed by a conclusion and recommendation.

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### **Pros**

1. **Compatibility and Fitment**

- The 68333007AC is a **direct replacement** for stock cylinder heads in many **Chrysler V8 engines**, including the **360 (LA series)** and **400 (RB/RB4 series)**. It is commonly used in performance builds, restorations, and engine swaps.

- It is often **easier to source** than aftermarket alternatives, especially for classic car enthusiasts who prefer OEM parts.

2. **Durability and Reliability**

- Mopar (Chrysler s original equipment parts) is known for **high-quality casting and machining**, making these heads **strong and long-lasting** when properly maintained.

- The **valve springs and retainers** are typically **heavy-duty**, reducing the risk of valve float at high RPMs compared to some aftermarket options.

3. **Ease of Modification**

- The **porting and flow characteristics** are well-documented, allowing for **relatively straightforward modifications** (e.g., porting, polishing, or installing aftermarket valves).

- Many **performance parts** (e.g., headers, intake manifolds, and camshafts) are designed to work seamlessly with this head.

4. **Cost-Effectiveness for Stock Applications**

- If you re **restoring a stock engine** or building a **street/weekend cruiser**, this head is often **cheaper than aftermarket alternatives** while still providing good performance.

- It avoids the need for **custom machining** that some aftermarket heads require.

5. **Availability of Support and Resources**

- Since these heads are **widely used**, there is a **large community of builders** who have shared knowledge on tuning, modifications, and common issues.

- Mopar parts are **easier to find in salvage yards, eBay, and specialty shops** compared to rare aftermarket options.

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### **Cons**

1. **Stock Flow Restrictions**

- The **stock porting is not optimized for high performance**. While adequate for **stock or mild builds**, it **chokes airflow** compared to aftermarket heads designed for **high horsepower applications**.

- **Flow numbers** are typically lower than **performance heads** (e.g., **Edelbrock, Holley, or JE heads**), limiting **top-end power** without modifications.

2. **Potential for Leaks and Wear**

- **Gasket surfaces** can develop **warping or cracks** over time, leading to **oil or coolant leaks** if not properly sealed.

- The **valve guide and seat wear** can become an issue in **high-mileage or aggressive driving** scenarios, requiring **valve job or replacement**.

3. **Limited High-Performance Potential Without Mods**

- Even with **polishing and porting**, the **stock combustion chamber shape** is not ideal for **high compression or forced induction**.

- **Aftermarket heads** (e.g., **JE 400 heads**) often provide **better flow and stronger construction** for **big power builds**.

4. **Weight Considerations**

- While not excessively heavy, these heads are **heavier than some aftermarket aluminum alternatives**, which can **reduce high-RPM responsiveness** in performance applications.

5. **Mixed Quality in Aftermarket Sources**

- Not all **Mopar 68333007AC heads** are created equal. Some **salvaged or reconditioned units** may have **hidden damage** (e.g., cracked decks, worn valve guides).

- **Purchasing from unknown sellers** increases the risk of **counterfeit or poorly reconditioned parts**.

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### **Conclusion**

- **Stock restorations** where OEM parts are preferred.

- **Mild performance builds** (e.g., **300-400 HP naturally aspirated**).

- **Budget-conscious builders** who want **reliable, easy-to-find parts**.

However, for **high-performance applications** (e.g., **500 HP, forced induction, or aggressive camshafts**), **aftermarket heads** (such as **JE, Edelbrock, or Holley**) offer **better flow, stronger construction, and higher reliability**.

If you **plan to keep modifications minimal** and prioritize **durability and ease of use**, the **68333007AC is a good investment**. If you **intend to push the engine hard**, investing in a **performance head** may be worth the extra cost.

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### **Recommendation**

- You are **restoring a stock engine** or building a **street/weekend cruiser**.

- You **won t exceed 400 HP** and plan **minimal modifications** (polishing, mild porting).

- You **prefer OEM parts** for reliability and ease of sourcing.

- You plan **forced induction (turbo/supercharger)** or **high-RPM applications**.

- You want **better flow, stronger construction, and higher horsepower potential**.

- You are building a **high-performance engine** (500 HP).

- **Inspect the head** for **cracks, warping, or worn valve guides**.

- **Check the valve spring condition** weak springs can cause **valve float**.

- **Verify compatibility** with your **camshaft, intake, and fuel system** to ensure proper tuning.

For most **stock-to-mildly-modified builds**, the **68333007AC is a practical and cost-effective choice**. For **serious performance applications**, upgrading to a **specialty head** will yield better results.

Details:

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part #: 68333007ac prices

• $915.75-$1385.05

specifications cylinderheapar:

• for makes: Mopar
• mpn: 68333007ac
• manufacturer warranty: 1 Year
• core charge: 250.00 Which Is Included In The Total Price
• type: Engine Cylinder Head

shipping cylinderheapar:

• cost: $0.00
• transit: 17-28 Days
• class: Standard
• service: Standard
• type: Fixed

payments cylinderheapar:

• wallet: Paypal
• other
• credit card: Discover

seller cylinderheapar:

• rating: 98.4%
• # reviews: 16399
• city: Garland, Texas

returns cylinderheapar:

• time: 60 Days
• policy: Returns Accepted
• paid by: Seller

offer cylinderheapar:

• options: Ship-to-home
• started: February 2, 2026
• availability: In Stock
• sold: 0

general cylinderheapar:

• Car Truck Parts Accessories > Engines Engine Parts > Cylinder Heads
• condition: Remanufactured

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