CHEVROLET 39339148 Port Cast Cylinder Head

( Brand: Chevrolet ), ( Manufacturer Part Number: 39339148 ), ( Type: Cylinder Head ), ( Material: Cast Iron ), ( Vintage Part: Yes ), ( Finish: Unfinished ), ( Performance Part: No )

Review CHEVROLET Chevy Oval Port Cast #39339148 Cylinder Head fits 427 1967

The **1967 Chevrolet 427 Port-Cast Cylinder Head (Part Number 39339148)** is a meticulously crafted, high-performance component designed to elevate the breathing and power output of a classic Chevrolet big-block engine, particularly the legendary 427 cubic-inch V8. This cylinder head represents a rare and sought-after piece of automotive heritage, embodying the engineering prowess of the mid-1960s when Chevrolet pushed the boundaries of horsepower and reliability. Crafted from high-grade cast iron, the head features a robust, thick-walled design that ensures durability under extreme stress, making it ideal for both street applications and high-performance drag racing. The **port-cast construction** is a hallmark of this head, where the intake and exhaust ports are integrally cast into the head block rather than machined afterward, resulting in a smoother, more efficient flow path that enhances airflow and combustion efficiency. This design choice not only improves performance but also adds a distinctive aesthetic appeal, with its bold, sculpted port shapes that are both functional and visually striking.

The **1967 427 port-cast head** is engineered to pair seamlessly with Chevrolet s iconic **427 cubic-inch engine**, which was a staple in muscle cars like the Chevelle SS, Corvette, and Impala SS. The head features **four-valve-per-cylinder architecture**, with large, aggressive intake ports that funnel air into the combustion chamber with minimal restriction, and exhaust ports that efficiently expel spent gases to maximize power delivery. The **combustion chamber shape** is optimized for high-compression performance, often paired with a **10.5:1 or 11:1 compression ratio** when tuned correctly, allowing for substantial power gains when mated to a high-performance camshaft, such as a **4340 or 4360 Chevy cam** or even aftermarket options like a **Mellon or Crane hydraulic flat-tappet cam**. The **valve sizes** typically **2.19-inch intake and 1.72-inch exhaust** are generous enough to support significant horsepower levels, making this head a favorite among builders looking to push their engines into the **500 to 700 horsepower range** with proper supporting modifications.

Beyond its performance benefits, the **1967 Chevrolet 427 port-cast head** is a prized collector s item due to its scarcity and historical significance. These heads were produced in limited quantities during the height of Chevrolet s big-block era, and finding one in original condition especially with a matching **427 engine and intake manifold** can be a challenge for enthusiasts. The **port-cast design** also contributes to its desirability, as it offers a unique blend of vintage styling and modern performance characteristics. When restored, these heads exhibit a **distinctive matte-finish cast iron** with subtle texture variations that highlight their handcrafted nature, often accompanied by **original Chevrolet markings** that include the iconic "Chevrolet" logo and engine displacement identification. For those seeking authenticity, pairing this head with a **restored 1967 Chevelle SS, Corvette, or Nova SS** creates a visually stunning and mechanically potent combination that turns heads at any car show.

To fully unlock the potential of this cylinder head, it is essential to pair it with a **high-performance engine package**, including a **427 crankshaft, forged connecting rods, and a high-lift camshaft**, as well as supporting components like a **high-flow intake manifold** (such as a **Holley 4150 or Edelbrock Performer**) and a **performance exhaust system**. The **valve springs and retainers** should be upgraded to handle the increased stress from aggressive camshafts, and **high-quality valves and valve springs** (such as **Mellon or Crane components**) will ensure reliable operation. Additionally, **porting and polishing** the head can further enhance airflow, though this should be done by a professional to avoid compromising the head s structural integrity. When properly tuned and paired with a **high-octane fuel and a reliable ignition system**, the **1967 Chevrolet 427 port-cast cylinder head** delivers a **thundering, high-revving exhaust note** and a **smooth, linear power curve** that is characteristic of the golden age of American muscle.

In summary, the **1967 Chevrolet 427 Port-Cast Cylinder Head (Part Number 39339148)** is more than just a replacement part it is a piece of automotive history that embodies the spirit of American engineering and performance. Whether used in a **restored classic muscle car, a high-performance street machine, or a drag racing beast**, this head brings a blend of vintage charm and modern capability that is unmatched in the world of big-block Chevrolet engines. For the dedicated enthusiast, it represents the ultimate combination of **power, heritage, and craftsmanship**, making it a must-have component for anyone looking to build or restore a true legend of American automotive engineering.

### **Pros and Cons of Buying a 1967 Chevrolet 427 Big Block with Cast-Iron Cylinder Heads (VIN 39339148)**

#### **Pros**

1. **Classic Big Block Power**

The 1967 Chevrolet 427 is one of the most legendary big-block engines ever produced, known for its raw, high-revving power. With proper maintenance, it can produce **400 horsepower** in stock form and significantly more with modifications. This makes it a favorite among enthusiasts who appreciate brute-force American muscle.

2. **Strong Aftermarket Support**

The 427 big block has been around for decades, meaning there is an extensive aftermarket for parts, including cylinder heads, intake manifolds, camshafts, and performance upgrades. Swapping in aluminum heads, upgrading the cam, or installing a high-flow intake can dramatically improve performance.

3. **Durability with Proper Care**

While not as refined as modern engines, the 427 is built tough. With regular maintenance such as valve adjustments, rod bearing checks, and proper lubrication it can last **200,000 miles** or even longer. Many examples from the 1960s and 1970s still run today with minimal issues.

4. **Customization Potential**

- **Aluminum heads** (for better heat dissipation and performance)

- **High-performance cams** (for more power and torque)

- **Forced induction** (turbocharging or supercharging for extreme power)

- **Fuel injection** (replacing the carburetor for better fuel economy and power)

- **Crankshaft and connecting rod upgrades** (for increased reliability)

This makes it ideal for drag racing, street cruising, or even restoration projects.

5. **Nostalgia and Collectibility**

The 1967 Chevy 427 is a highly sought-after engine, especially in restored or high-performance condition. It holds value well in the classic muscle car market, making it a good investment if you plan to sell later.

6. **Lower Cost of Ownership (Compared to Modern Muscle)**

While parts can be expensive, labor costs are often lower than on modern engines, and many mechanics specialize in big-block Chevy repairs. Fuel efficiency is poor, but if you re running it on a budget, the cost per mile is still reasonable compared to a modern V8.

7. **Sound and Driving Experience**

The deep, rumbling growl of a 427 is unmatched by most modern engines. The raw, unfiltered power delivery provides an exhilarating driving experience, especially in a properly restored vehicle.

---

#### **Cons**

1. **High Maintenance Requirements**

Unlike modern engines with electronic fuel injection and computer-controlled systems, the 427 relies on **mechanical components** that require frequent attention:

- **Valve adjustments** (must be done every 3,000 5,000 miles to prevent valve float)

- **Rod bearing checks** (big blocks are prone to rod knock if bearings wear)

- **Camshaft wear** (soft cam lobes can wear out over time)

- **Seals and gaskets** (oil leaks are common, especially around the valve covers and oil pan)

- **Fuel system issues** (carburetors require tuning and cleaning)

2. **Poor Fuel Efficiency**

The 427 is a **thirsty engine**, consuming **12 15 MPG** in a stock condition. Modern fuel prices make long-distance driving expensive, and the engine struggles with modern fuel standards (though ethanol blends can be used with proper modifications).

3. **Emissions and Modern Compliance**

- **Install an emissions system** (catalytic converter, PCV, etc.), which can be costly.

- **Modify the engine** to meet modern smog standards (some states require this).

- **Use lead-free fuel** (though the 427 can handle it with proper adjustments).

Some enthusiasts run "street-legal" versions with emissions equipment, while others keep them as **show-only or track-only** vehicles.

4. **Weight and Handling**

The 427 is heavy (around **600 700 lbs** with the drivetrain), which can make the car **less nimble** than modern muscle cars. Suspension and steering may need upgrades for better handling.

5. **Parts Availability and Cost**

- **Aluminum heads** (a major upgrade) can cost **$1,000 $2,000 ** each.

- **High-performance cams** (from brands like **Comp Cams or Holley**) can run **$500 $1,500**.

- **Replacement rod bearings or main bearings** can cost **$200 $500 ** per set.

- **Oil pumps and lifters** are common wear items that need replacement.

6. **Potential for Hidden Issues**

- **Rod bearing wear** (can lead to catastrophic failure if ignored)

- **Cracked cylinder heads** (common in high-mileage examples)

- **Worn camshafts** (soft lobes can cause excessive valve train wear)

- **Leaking oil galley plugs** (a common issue that can lead to oil starvation)

A **comprehensive inspection** (including a **rod knock test, compression check, and head gasket integrity test**) is **essential** before purchase.

7. **Insurance Costs**

Classic muscle cars with big-block engines can be **expensive to insure**, especially if you plan to drive them regularly. Some insurers may charge **premium rates** due to the engine s power and potential for damage.

8. **Limited Modern Technology**

Unlike modern engines with **direct injection, turbocharging, and advanced fuel management**, the 427 relies on **carburetors, mechanical fuel pumps, and basic ignition systems**. This means:

- **Less efficiency** (both in power and fuel economy)

- **More tuning required** for optimal performance

- **Less reliability in extreme conditions** (e.g., high-altitude driving)

---

### **Conclusion and Recommendation**

#### **Who Should Buy This Engine?**

- **Enthusiasts who love the raw power and sound of a classic big-block Chevy.**

- **Restoration project owners** willing to invest time and money into bringing it back to peak condition.

- **Drag racers or track enthusiasts** who prioritize power over daily drivability.

- **Collectors** who see value in owning a piece of automotive history.

- **Mechanically inclined individuals** who enjoy working on engines and don t mind maintenance.

#### **Who Should Avoid This Engine?**

- **Casual drivers** who want a reliable, low-maintenance daily car.

- **Budget-conscious buyers** who can t afford frequent repairs or part replacements.

- **Those who prioritize fuel efficiency** (expect **12 15 MPG** at best).

- **People who dislike noise** (the 427 is **loud**, especially at high RPM).

- **Those who want a "plug-and-play" modern muscle car experience.**

#### **Final Recommendation**

If you re **passionate about classic American muscle** and willing to **invest time and money into maintenance**, the **1967 Chevy 427 with cast-iron heads** is an **excellent choice**. It offers **unmatched power, customization potential, and a thrilling driving experience** but only if you re prepared for the **high upkeep and occasional headaches**.

1. **Get a professional inspection** (focus on rod bearings, heads, and camshaft condition).

2. **Budget for major upgrades** (aluminum heads, camshaft, fuel system, and emissions if street-legal).

3. **Decide on your goal** will this be a **daily driver, a project car, or a track-only beast?**

4. **Consider insurance costs** and whether you can afford them.

If you re **serious about the 427**, it s a **fantastic engine** that will provide **years of enjoyment** but it s not for the faint of heart. For those who appreciate **raw power and classic American engineering**, it s a **worthwhile investment**. For everyone else, a **modern muscle car or a well-maintained small-block Chevy** might be a more practical choice.

Details:

1967 CHEVY 427 OVAL PORT CAST #39339148 CYLINDER HEAD. Head has been resurfaced. The cylinder head for sale has been and no cracks. Head is sold as.

Buyer will need to purchase valve springs, retainers, and keepers match the application.

part #: 39339148 price

• $1050.00

specifications cylinderheapar:

• for models: 427
• for makes: Chevy, Chevrolet
• for years: 1967
• brand: Chevrolet
• mpn: 39339148
• type: Cylinder Head
• material: Cast Iron
• vintage part: Yes
• finish: Unfinished
• performance part: No

returns cylinderheapar:

• policy: No Returns

shipping cylinderheapar:

• transit: 4-11 Days
• type: Calculated
• cost: $101.28
• carrier: UPS
• service: UPS Ground
• class: Standard

general cylinderheapar:

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

seller cylinderheapar:

• rating: 100.0%
• # reviews: 59
• city: Euclid, Ohio

payments cylinderheapar:

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

offer cylinderheapar:

• availability: In Stock
• quantity: 1
• options: Ship-to-home
• started: February 9, 2026
• sold: 0

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