GM 4L65E 4SPD

High-performance engine block for Chevrolet 5.0L marine applications. The ATK Marine Engine Block Long is engineered specifically for marine applications, providing reliable performance for Chevrolet 5.0L and 305 cubic inch engines. This engine block features a robust cast iron construction for both the block and cylinder heads, ensuring durability and longevity in demanding marine environments. With a horsepower output of 230, this engine is designed to deliver maximum performance while maintaining efficiency. Built with a flat tappet cam and a steel front cover, the ATK Marine Engine Block is optimized for marine use, making it suitable for various boating activities. The inclusion of a one-piece rear seal enhances the engine's reliability by minimizing oil leaks. This product does not require a core charge, simplifying the purchasing process for customers. ATK's commitment to quality ensures that this marine engine block meets the rigorous demands of boating, providing peace of mind for boat owners. Whether for recreational or commercial use, this engine block is a dependable choice for enhancing your vessel's performance.