Engine Block Boss 351W

The Engine Block Boss 351W is a premium bare block foundation designed for serious performance builds and restoration projects. It caters to professional builders, restoration shops, and dedicated enthusiasts who require OEM-specification reliability. This block is engineered to support high-output engine assembly, making it a trusted choice among automotive professionals.

Constructed from durable cast iron, the Engine Block Boss 351W features a 4.000-inch bore and a 9.200-inch deck height, which are essential for accommodating various street and race-oriented stroker configurations. The 4-bolt main bearing design enhances strength under load, while the 1-piece rear seal interface simplifies gasket management and minimizes leak points. These specifications ensure compatibility with a wide range of crankshaft, rod, and piston combinations.

Ideal for restoration shops working on classic Fords and performance builders constructing larger cubic-inch combinations, the Engine Block Boss 351W is a versatile choice for engine reconditioning facilities. Its bare block presentation ensures zero surface contamination and a factory finish, which is critical for precision machine work and custom porting operations. This block allows builders to fine-tune displacement and compression ratios to meet specific power targets.