fits make: Chevy. year: 1969–1970.

( Manufacturer Part Number: 3946074 ), ( Part Type: Aluminum Block Head )
This is a high-quality 12-17-69 Big Block Chevy BBK Rectangle Port Head, specifically model number 3946074 or 074. This Big Block Chevy head is a must-have for any enthusiast or professional working on a 1969 or 1970 Chevrolet vehicle.
The head features a rectangular port design, which provides excellent airflow and combustion efficiency. The 12-17-69 Big Block Chevy BBK Rectangle Port Head is manufactured with precision and attention to detail, ensuring a perfect fit and reliable performance.
The head is designed for use with a 396 or 402 cubic inch engine, making it a great choice for anyone looking to upgrade their engine for increased power and performance. The head is also compatible with various intake and camshaft configurations, giving you the flexibility to customize your engine to your specific needs.
The 12-17-69 Big Block Chevy BBK Rectangle Port Head is made of high-grade aluminum alloy, which is lightweight yet strong, reducing engine weight and improving overall performance. The head also features reinforced valve seats and jet-type fuel injection ports, ensuring reliable performance and longevity.
In conclusion, this 12-17-69 Big Block Chevy BBK Rectangle Port Head is a high-quality and reliable upgrade for any 1969 or 1970 Chevrolet vehicle. With its rectangular port design, compatibility with various engine configurations, and high-grade aluminum alloy construction, this head provides excellent airflow, combustion efficiency, and power. Whether you're a professional mechanic or a passionate hobbyist, this head is a great investment for your Big Block Chevy engine.
Pros of buying a 1969-1970 Big Block Chevy BB with a rectangle port head (3946074 074):1. Power: The big block Chevy engine is renowned for its power and torque, making it an ideal choice for performance enthusiasts.
2. Availability of parts: Due to its popularity, replacement parts for this engine are widely available, ensuring easy maintenance and repair.
3. Customizability: The Big Block Chevy engine can be easily modified and upgraded to meet specific performance requirements.
4. Reliability: The design of the engine is proven to be reliable and durable, providing years of trouble-free operation.
Cons of buying a 1969-1970 Big Block Chevy BB with a rectangle port head (3946074 074):1. Fuel efficiency: The Big Block Chevy engine is not known for its fuel efficiency, which may result in higher operating costs.
2. Size and weight: The engine is large and heavy, which can impact the overall weight and handling of the vehicle.
3. Maintenance: Due to its size and power, the engine requires regular maintenance and tuning to ensure optimal performance.
Conclusion:The 1969-1970 Big Block Chevy BB with a rectangle port head (3946074 074) is a powerful and reliable engine choice for performance enthusiasts. While it may not offer the best fuel efficiency or handling, its availability of parts, customizability, and proven reliability make it an attractive option for those seeking a high-performance engine. If you're willing to invest in the necessary maintenance and upgrades, this engine can provide years of enjoyable and exhilarating driving experiences.
Recommendation:If you're in the market for a high-performance engine, the 1969-1970 Big Block Chevy BB with a rectangle port head (3946074 074) is definitely worth considering. However, make sure to budget for necessary maintenance and upgrades, and consider the impact of the engine's size and weight on your vehicle's overall performance and handling. With proper care and attention, this engine can deliver a thrilling driving experience for years to come.
Date is either or head has been milled down to where no corner marks left. Valve cover rail along the whole intake side has been repaired and looks fine.
No porting or polishing. All threaded holes look good. One snow flake big block Chevy bbc aluminum rectangle port head 074one single cylinder.