GM 3755538 Cylinder Heads High Performance General

( Brand: Gm ), ( Manufacturer Part Number: 3755538 ), ( Type: Cylinder Head ), ( Material: Cast Iron ), ( Vintage Part: Yes ), ( Country Of Origin: United States )

Review GM General Motors Oem Sbc Cylinder Heads Inch Chevy High Performance Wow fits 283 1959–2010

The **1959 Chevrolet 283 V8 High-Performance Cylinder Heads (Part Number 3755538, 3755538GM)** represent a legendary component in the world of classic American muscle, embodying the engineering prowess and bold performance ethos of the mid-20th century. These heads are meticulously crafted for the iconic **283 cubic-inch small-block Chevy V8**, a powerplant that became synonymous with high-revving, torque-rich performance in everything from street rods to drag racing machines. Originally designed for the **1959 Corvette, Bel Air, and other high-performance Chevy models**, these cylinder heads were engineered to deliver exceptional breathing efficiency, durability, and heat dissipation qualities that remain highly sought after by enthusiasts and restorers today.

The **3755538GM heads** feature a **1959-style design**, characterized by their **cast iron construction** with **integrated exhaust ports** that flow smoothly into the combustion chamber, promoting optimal scavenging and improved cylinder filling. The **combustion chambers** are **shallow and wedge-shaped**, a hallmark of the era, which, when paired with the right camshaft and valve train, allows for high-revving operation and strong low-end torque qualities that make them ideal for both street and track applications. The **valve sizes** are typically **1.94-inch intake and 1.56-inch exhaust**, offering a balanced flow that complements the 283 s naturally aspirated potential while still accommodating forced induction when modified.

One of the most distinctive features of these heads is their **integrated exhaust ports**, which eliminate the need for separate manifolds in many applications, reducing weight and complexity. The **valve springs and retainers** are robust, designed to handle the stresses of high RPM, making them a favorite among builders looking to push the 283 s power output to its limits. Additionally, the **threaded spark plug holes** and **properly sized water jackets** ensure efficient cooling, preventing overheating even under heavy loads. When paired with a **high-performance camshaft** (such as a **4340 or 4550 Chevy cam**), these heads can produce **300 horsepower** in stock form, with even greater gains achievable through **porting, polishing, and modern upgrades** like **stainless steel valves, upgraded valve springs, and high-flow headers**.

For collectors and restorers, these **1959 283 cylinder heads** are not just functional they are **iconic pieces of automotive history**. Their **vintage styling**, including the **distinctive exhaust port contours and valve cover mounting points**, make them instantly recognizable to enthusiasts. Whether installed in a **fully restored 1959 Chevy Bel Air, a modern street rod, or a high-performance drag car**, these heads add authenticity and character while delivering genuine performance. Their **universal compatibility** with most **283, 292, and 327 small-block Chevy engines** further enhances their value, making them a **must-have for anyone seeking to build or restore a true American muscle machine**. With proper maintenance and upgrades, these heads can last decades, proving that their legacy is as enduring as the engines they power.

Buying a set of **1959 Chevy 283 high-performance cylinder heads (GM part number 3755538, 10-degree combustion chamber)** can be a great way to enhance the performance of a classic small-block Chevy engine, but it comes with both advantages and challenges. Below is a detailed breakdown of the pros and cons, followed by a conclusion and recommendation.

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### **Pros of Buying 1959 Chevy 283 High-Performance Heads (3755538, 10 CC)**

1. **Proven Performance**

The 1959 high-performance heads were designed for the **283 HP 283 (HP283)** and were among the first production heads to feature **10-degree combustion chambers**, which improved volumetric efficiency and power output compared to earlier 20-degree heads. They are known for producing strong low-end torque and good mid-range power, making them ideal for street and light drag applications.

2. **Better Flow Than Stock Heads**

These heads have **larger ports and better flow characteristics** than the stock 1955 1958 heads, which helps improve breathing and power. They were also used in the **283 HP283** and **283 HP283 with 4-barrel carburetion**, proving their effectiveness in high-performance applications.

3. **Compatibility with Modern Engines**

While they were originally paired with **283 cubic inch engines**, they can be adapted to **302, 327, and even 350 small-block Chevy engines** with proper port matching and valve sizes. Many builders use them in **restomod engines** for a classic look with modern performance.

4. **Aesthetic Appeal**

The **1959 high-performance heads** have a distinct **flat-topped valve cover design** and **rounded ports**, which are highly sought after by collectors and restorers. They add a classic, high-performance look to an engine bay.

5. **Good for Forced Induction (With Modifications)**

While not ideal for high boost applications without modifications, these heads can be **ported and polished** to handle **light turbocharging or supercharging** (typically up to 10 15 psi with supporting mods like a stronger crank, rods, and pistons).

6. **Availability of Parts and Support**

Since these heads are from a well-documented era, **aftermarket parts (valves, springs, retainers, gaskets, etc.) are widely available**. There is also a wealth of **tuning guides, porting instructions, and community knowledge** for Chevy small-block heads.

7. **Potential for Upgrades**

The heads can be **ported, polished, and modified** to improve flow further. Many builders **swap in larger valves (2.00" intake, 1.60" exhaust)** or **install hydraulic flat-tappet valves** for smoother operation.

8. **Historical Significance**

For enthusiasts who appreciate **classic high-performance Chevy parts**, these heads are a piece of automotive history. They were used in **factory race engines** and **high-performance street cars** of the late 1950s.

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### **Cons of Buying 1959 Chevy 283 High-Performance Heads (3755538, 10 CC)**

1. **Age and Wear**

Many used sets of these heads are **decades old**, meaning they may have **wear in the valve guides, seat surfaces, or exhaust ports**. A thorough inspection (or professional machining) is often required before use.

2. **Potential for Poor Condition**

Since they were originally used in **high-performance applications**, some may have been **over-revved or run with poor fuel mixtures**, leading to **warped decks, cracked combustion chambers, or burned valves**. Always **check for cracks, warpage, and seat condition**.

3. **Port Matching Challenges**

If you're using them on a **non-283 engine (e.g., 302, 327, or 350)**, you may need to **modify the ports** to match the deck height and valve size of your specific engine. This can be a **DIY-intensive project** if you don t have the right tools.

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

While these heads are **better than stock**, they are **not as flow-efficient as modern high-performance heads** (e.g., **Edelbrock, Holley, or custom ported heads**). For **high-RPM or forced induction applications**, you may need to **port them aggressively** or consider **aftermarket heads**.

5. **Valvetrain Limitations**

The **1959 HP283 heads** came with **solid lifters**, which can be noisy and require **proper lubrication**. Many builders **upgrade to hydraulic flat-tappet lifters** for smoother operation, adding cost.

6. **Gasket and Seal Issues**

Older heads may have **leaky valve cover gaskets, exhaust port gaskets, or oil leaks** around the valve stems. Replacing **gaskets and seals** is often necessary before installation.

7. **Cost of Preparation**

- **Porting and polishing** (if not already done)

- **Valve job (seats, guides, springs, retainers)**

- **Deck machining** (if warped)

- **Exhaust manifold swaps** (if using modern headers)

- **Carburetion upgrades** (for better fuel delivery)

8. **Not Ideal for Extreme Power**

Without **aggressive porting, larger valves, and supporting engine mods (crank, rods, pistons)**, these heads are **not suitable for high horsepower applications** (e.g., **500 HP naturally aspirated or high-boost turbo**). For such applications, **modern high-performance heads** (e.g., **Edelbrock Performer RPM, Holley, or custom heads**) are often a better choice.

9. **Finding a Good Set Can Be Difficult**

Since these heads are **not as common as stock heads**, locating a **clean, unmodified set** can be challenging. Many sellers may **overprice them** due to their rarity, or they may be **heavily used and worn**.

10. **Compatibility with Modern Fuel Systems**

If you're running a **modern fuel-injected or high-performance carbureted engine**, you may need to **adjust ignition timing, fuel delivery, and exhaust tuning** to work optimally with these heads.

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### **Conclusion**

- **Restorers** who want a **classic, high-performance look**.

- **Builders of street or light drag engines** (250 400 HP naturally aspirated).

- **Enthusiasts who appreciate vintage parts** and don t mind some **preparation work**.

- **Engines where a balance of classic styling and decent power** is desired.

However, they **require careful inspection and potential modifications** before use, and they **won t handle extreme power** without significant upgrades. If you're building a **high-RPM, high-horsepower engine**, you may want to consider **aftermarket heads** instead.

---

### **Recommendation**

You have a **283 engine** (or are willing to modify ports for a 302/327/350).

You want a **classic, high-performance look** with **decent stock flow**.

You re willing to **invest time and money in porting, valve jobs, and tuning**.

Your power goals are **250 400 HP naturally aspirated** (or light turbo/supercharging with mods).

You find a **clean, unmodified set** at a **reasonable price**.

You need **high-RPM or extreme power** (500 HP NA or high boost).

You don t want to **spend extra on porting, machining, or valvetrain upgrades**.

You prefer **modern, high-flow heads** for maximum performance.

You can t find a **reliable, well-documented set** in good condition.

- **Inspect thoroughly** (look for cracks, warpage, seat condition).

- **Get them ported and polished** (or do it yourself if experienced).

- **Upgrade the valvetrain** (hydraulic lifters, larger valves if desired).

- **Pair with a strong supporting engine** (crank, rods, pistons, fuel system).

- **Tune the ignition and fuel delivery** for optimal performance.

If you're serious about these heads, **budget for at least $1,000 $2,000** in total costs (heads mods labor if needed). For **maximum performance**, modern heads may still be the better long-term investment, but for **classic enthusiasts**, the 1959 HP

Details:

The 3731538 head lists as being used by GM on high performance 283 engines in 1959. This is a pair of OEM GM cylinder heads for Small Block Chevy engines. These heads recently came out of the collection a lifetime Corvette collector and enthusiast. They have been cleaned and checked for cracks with none found.I do'nt see any breaks, modifications, or repairs to these heads.

These original 3755538 heads have become hard to find and are a must for your correct restoration. Don't miss this awesome pair of 3755538 cylinder heads. These heads are complete with valves and springs as shown. This is a true factory matched pair of heads.

These heads are good cores for rebuilding. These heads also have the X cast on below casting number as shown which commonly denotes a high performance or experimental part. The casting number on each head is 3755538. He collected many parts over the years in anticipation of future restorations.

These heads have been in cool, dry storage for decades.

part #: 3755538 prices

• $659.99-$795.00

specifications cylinderheapar:

• for models: 283
• for makes: Chevy
• for years: 1959-2010
• brand: Gm
• mpn: 3755538
• type: Cylinder Head
• material: Cast Iron
• vintage part: Yes
• country of origin: United States

returns cylinderheapar:

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

payments cylinderheapar:

• wallet: Apple-pay
• credit card: Mastercard
• money order
• other

general cylinderheapar:

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

offer cylinderheapar:

• quantity: 1
• best offers: True
• availability: In Stock
• options: Ship-to-home
• sold: 0
• started: February 13, 2026

seller cylinderheapar:

• rating: 99.8%
• # reviews: 17482
• city: Santa Cruz, California

shipping cylinderheapar:

• class: Standard
• transit: 5-10 Days
• cost: $88.85
• type: Fixed
• service: Standard

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