Hawks Motorsports offers our clients this BPP12110353 GM Small Block Compatible Bare Block 9.025 Deck x 4.000 Bore, 1-Piece Seal, 350 Main, SIAM Ductile Cast Main Caps, BluePrint Engines for custom small block Chevrolet engine builds requiring a durable and versatile engine block foundation. This bare block is designed around GM Small Block architecture and provides engine builders with a solid platform for performance street, restoration, and custom engine applications.

The BPP12110353 features a 9.025-inch deck height, 4.000-inch cylinder bore, 350 main bearing configuration, 1-piece rear main seal design, SIAM (Siamese) cylinder wall construction, and ductile cast main caps. This configuration provides a strong foundation for builders creating custom small block combinations where increased cylinder wall support and reliable main bearing retention are important.

The SIAM cylinder wall design adds additional support between cylinder bores, making this block well suited for performance applications requiring additional strength compared to standard production-style blocks. The ductile cast main caps provide improved durability and stability for custom rotating assemblies when properly machined and assembled.

This BPP12110353 bare block is supplied as a foundation component only and requires professional machining, inspection, cleaning, measuring, and final assembly preparation. Engine builders should verify compatibility of all internal and external components, including crankshaft, pistons, rods, cylinder heads, oiling system, accessory components, and transmission requirements before assembly.

Key Features:

• Part number BPP12110353
• BluePrint Engines GM Small Block compatible bare block
• 9.025-inch deck height
• 4.000-inch cylinder bore
• 350 main bearing configuration
• 1-piece rear main seal design
• SIAM (Siamese) cylinder wall construction
• Ductile cast main caps
• Cast iron engine block construction
• Designed for custom small block Chevrolet engine builds
• Strong foundation for performance street and restoration applications
• Improved cylinder wall support for high-performance combinations
• Compatible with custom rotating assemblies when properly matched
• Bare block configuration for custom engine assembly
• Requires professional machining and final preparation before use

Fitment Applications:

GM Small Block Chevrolet Compatible Applications:

• Chevrolet Small Block V8 custom engine builds
• Performance street engine applications
• Restoration engine builds requiring aftermarket small block architecture
• High-performance engine applications

Common Engine Configurations:

• Small Block Chevrolet performance builds
• Custom 350-based engine combinations
• Stroker small block Chevrolet combinations when properly configured
• Custom rotating assembly builds

Fitment Note:
Verify engine component compatibility before ordering, including crankshaft stroke, piston specifications, connecting rod length, cylinder head compatibility, intake manifold compatibility, oil pan configuration, accessory mounting requirements, and vehicle-specific installation details.

Installation Notes:

• This listing is for a bare engine block only.
• No rotating assembly, pistons, crankshaft, rods, camshaft, cylinder heads, bearings, timing components, or accessories are included unless specifically stated.
• Block requires professional inspection, machining, cleaning, and final preparation before assembly.
• Verify bore size, piston-to-wall clearance, deck height, bearing clearances, and rotating assembly compatibility before final assembly.
• Confirm compatibility of all internal and external engine components before ordering.
• Professional machining procedures are required for bore sizing, honing, deck preparation, align honing, and final engine preparation.
• Verify oiling system, timing components, accessory brackets, transmission compatibility, and vehicle application requirements before installation.
• Professional engine-building experience or qualified machine shop assistance is recommended.