fits model: 396, 427. make: Chevy. year: 1968.

( Manufacturer Part Number: 3919840 ), ( Part Type: Block Head )
The product in question is a set of 1968 Chevrolet 427 big block cylinder heads, specifically model numbers 3919840 port 396, 18-8, and E-14-8 F-18-8. These heads are designed for high-performance applications, featuring a large 396 cubic inch displacement for increased power output.
The 18-8 designation refers to the material used in the construction of the valve covers and intake manifold, which is a high-strength stainless steel alloy known as 18-8. This material is resistant to corrosion and heat, ensuring long-lasting durability and reliability.
The E-14-8 F-18-8 designation refers to the specific intake and exhaust port sizes. The E-14-8 refers to the intake ports, which are 1.865 inches in diameter and have a rectangular shape, while the F-18-8 refers to the exhaust ports, which are also 1.865 inches in diameter but have a square shape. These port sizes are optimized for maximum airflow and power output.
The cylinder heads are designed with a 4-bolt main bearing cap for increased strength and stability, and feature 2.02-inch intake valves and 1.60-inch exhaust valves. The valve guides are made of sodium-filled aluminum for improved heat dissipation, and the valve springs are made of high-tensile steel for increased durability and reliability.
Overall, this set of 1968 Chevrolet 427 big block cylinder heads is a high-performance upgrade for any classic Chevy engine, offering increased power output, improved durability, and optimized airflow for maximum performance.
Product: (3919840) Port 396 18-8 1968 427 14-8 block big rectangle 840 Chevy heads E-14-8 F-18-8
Pros:1. High Quality Materials: The product is made of 18-8 stainless steel, which is known for its durability and resistance to corrosion.
2. Large Size: The block is big and rectangular, providing a large surface area for engine performance.
3. Compatibility: It is compatible with Chevy engines, specifically those with 427 cubic inches.
4. E-14-8 and F-18-8 heads: These heads are specifically designed for high performance and can improve engine efficiency and power.
Cons:1. Cost: The product is expensive due to the high-quality materials and large size.
2. Weight: The product is heavy, making it more difficult to transport and install.
3. Requires Expertise: Installing this product requires a certain level of expertise and knowledge of engines.
Conclusion:The (3919840) Port 396 18-8 1968 427 14-8 block big rectangle 840 Chevy heads E-14-8 F-18-8 is a high-quality product that can significantly improve engine performance. However, it is expensive, heavy, and requires expertise to install. If you have the budget, expertise, and need for improved engine performance, this product is a great investment. If not, you may want to consider a less expensive option that better fits your needs and capabilities.
No porting or polishing big block Chevy rectangle port heads e 14 8 f 18 8 cleaned and checked for cracks. Plenty of material on deck for future milling.
Nice pair of stock heads.