fits model: 396, 427. year: 1968.

( Brand: Gm ), ( Manufacturer Part Number: 3919840 ), ( Part Type: Block Head )
This is a high-quality replacement cylinder head for the 1968 Chevrolet Corvette 427 engine, specifically designed for the Big Block 396 engine with D-1-8 port configuration. The part number is 3919840, and it's manufactured by BBC GM.
This cylinder head is a direct replacement for the original, ensuring a perfect fit and easy installation. It features an 840 head casting and is suitable for 1-8 block Big Block engines. The 427 port configuration ensures optimal air and fuel intake, enhancing engine performance and power.
The head is made from high-grade materials, ensuring durability and longevity. It features a fully machined deck, valve guides, and seats, ensuring precise alignment and optimal valve function. The head also includes new valve springs, retainers, and locks, ensuring reliable valve control.
The 3919840 BBC GM 396 1-8 block Big Block 427 port D-1-8 cylinder head is designed to meet the demands of high-performance applications. It's a great choice for enthusiasts looking to improve their Corvette's engine performance, whether for street use or racing.
In conclusion, this BBC GM 396 1-8 block Big Block 427 port D-1-8 cylinder head is a high-quality replacement part that will enhance your 1968 Chevrolet Corvette's engine performance. Its precision machining, durable materials, and reliable components make it a reliable choice for any performance enthusiast.
Pros of purchasing a 1968 840 head 427 block (3919840 square bbc gm 396 1-8) include:1. High Performance: The 427 cubic inch engine is known for its power and performance. This block is capable of delivering significant horsepower and torque.
2. Durability: The BBC (Big Block Chevy) engine is known for its robustness and durability. It can withstand high horsepower and tough driving conditions.
3. Availability of Parts: The 1968 840 head 427 block is a popular engine, which means parts are readily available. This makes it easier to maintain and repair the engine.
4. Customizability: The BBC engine is highly customizable. You can modify it to fit your specific performance needs, such as adding a supercharger or turbocharger.
However, there are also some potential cons to consider:1. Cost: The 1968 840 head 427 block is not a cheap engine. You can expect to pay a premium for its performance and durability.
2. Complexity: The BBC engine is a complex machine with numerous components. This means it requires a certain level of expertise to maintain and repair.
3. Fuel Consumption: The 427 cubic inch engine is a thirsty one. It can consume a significant amount of fuel, which can add up over time.
In conclusion, the 1968 840 head 427 block (3919840 square bbc gm 396 1-8) is a powerful and durable engine that is highly customizable. However, it is also a complex and costly engine that can consume a significant amount of fuel. If you have the expertise and budget, this engine could be a great addition to your vehicle. But if you're looking for something more affordable or easier to maintain, you may want to consider other engine options.
The intake has had slight porting as you can see in the photos. The valves have been cut, the guides checked and cut for positive seals. All bolt holes are in good condition.
The head has been resurfaced and assembled with seals. This is a bbc rectangular port head. The date code sit has been taken apart, cleaned and .
Not a full port but just a gasket match.