CHEVY 3904390 Big Port Cylinder Head Block I-21-6

( Manufacturer Part Number: 3904390 ), ( Part Type: Cylinder Head Block )

Review CHEVY 21-6 Oval Big Port Cylinder Head Block Bbc fits 427 390 396 1967

The 3904390 21-6 is a highly sought-after Chevrolet engine block, specifically designed for the 1967 Big Port 390/396 cubic inch V8 engines. This particular block is compatible with the I-21-6, also known as the BBC (Bolt-Together Big-Block) engine, which is renowned for its ease of installation and versatility.

The block itself is made of high-quality cast iron, ensuring durability and reliability. It features a 4.000-inch bore and a 3.750-inch stroke, which contributes to its impressive power output. The block is also equipped with a four-bolt main cap design for enhanced strength and rigidity.

The cylinder head is a key component of this engine block, and the 3904390 21-6 comes with a 21-6 427 big port cylinder head. This head is known for its large intake ports, which allow for improved airflow and better engine performance. It also features a multi-angle valve job, which helps to optimize the intake and exhaust valve angles for maximum efficiency.

The 3904390 21-6 engine block is a popular choice among hot rod and classic car enthusiasts due to its power potential and ease of modification. It can be easily fitted with aftermarket components such as high-performance camshafts, intake manifolds, and cylinder heads to further enhance its performance.

In summary, the 3904390 21-6 is a robust and versatile engine block that is well-suited for high-performance applications. Its compatibility with the BBC I-21-6 engine and its 427 big port cylinder head make it a popular choice among those looking to build a powerful and reliable V8 engine.

1. Power: The 427 Big Port engine is known for its power and performance. With a displacement of 7.0 liters, it can produce up to 425 horsepower, making it a great choice for muscle car enthusiasts.

2. Versatility: The engine can be used in various applications, including street rods, drag racing, and hot rods. It can also be used in custom build projects.

3. Availability of Parts: The 427 Big Port engine is a popular choice, and parts are readily available. This means that maintenance and repairs can be done easily and at a reasonable cost.

4. Value: Due to its popularity and power, a well-maintained 427 Big Port engine can retain its value over time.

1. Cost: The engine can be expensive to purchase, especially if it is in excellent condition or has been upgraded.

2. Size: The engine is large and heavy, which can make it difficult to install in some vehicles.

3. Maintenance: The engine requires regular maintenance to keep it running smoothly. This includes oil changes, tune-ups, and regular inspections.

4. Fuel Consumption: Due to its power and size, the engine can consume a significant amount of fuel, which may be a concern for those who drive frequently.

The 1967 Chevy 427 Big Port engine with a 390/396 cylinder head is a great choice for those who value power and performance. However, it is important to consider the cost and maintenance requirements before making a purchase. If you are willing to invest in a well-maintained engine and have the space to install it, the 427 Big Port engine can provide years of enjoyment and satisfaction.

If you are interested in purchasing a 1967 Chevy 427 Big Port engine with a 390/396 cylinder head, I recommend doing thorough research to ensure that you are getting a good deal. Consider the condition of the engine, its history, and any upgrades that have been made. Also, make sure that you have the necessary resources and expertise to maintain and install the engine in your vehicle. If you are unsure, consider consulting with a professional mechanic or engine specialist.

Details:

Just a good rebuild core.

Fixed shipping of 55 to lower 48 states if your looking for this casting and date code this will work for you.

part #: 3904390 prices

• $495.00-$795.00

specifications cylinderheapar:

• for models: 427, 390, 396
• for makes: Chevy
• for years: 1967
• mpn: 3904390
• part type: Cylinder Head Block

General cylinderheapar:

• Motors > Parts & Accessories > Vintage Car & Truck Parts > Engines & Components > Cylinder Heads & Parts
• in stock: Yes
• condition: Used

Offer cylinderheapar:

• quantity: 1
• # bids: 0
• Started: February 25, 2016, 3:09 pm
• # Sold: 0
• best offer: true

Seller cylinderheapar:

• city: Kemmerer, Wyoming
• zipcode: 83101

Returns cylinderheapar:

• policy: no returns

Payments cylinderheapar:

• PayPal
• MOCC

Ratings:

1. Great communication. A pleasure to do business with. 02-24-16
2. Thank you for your order from all of us at Corvette Central 02-22-16
3. Great. A pleasure to do business with. 02-23-16
4. Quick response and fast payment. Perfect! THANKS!! 02-24-16
5. Great Buyer, Hope to deal with you again. Thank you. 02-07-16

Shipping cylinderheapar:

• handling: 2 days
• cost: $55.0
• type: Flat

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