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BluePrint Engines GM Small Block Compatible Bare Engine Blocks
If you're aiming to build a stout, reliable small block without breaking into exotic territory, the BluePrint Engines GM Small Block Compatible Bare Engine Blocks are the perfect foundation. Engineered to comfortably support combinations all the way up to 454 cubic inches, they deliver the strength, precision, and durability builder's demand. With thick cylinder walls, a rigid casting, and smart machining allowances, the BluePrint GM Small Block Compatible Bare Engine Blocks are structured to handle everything from a crisp street cruiser to a hard-hitting weekend track car. Key features and specifications: * Material Construction: EN-GJL-250 iron for increased strength * Design: Siamese bore construction with thick cylinder walls (approx. 0.230-inch at maximum bore) * Main Caps: Splayed 4-bolt main caps with 180,000-210,000 psi tensile strength * Deck Height: 9.025-inches (+0.005/-0.000) * Bore Options: Rough bores available at 3.995-inch to 3.997-inch or 4.120-inch to 4.122-inch, with a maximum finish bore of 4.250-inches * Capacity: Supports up to 454 cubic inches, with 4.125-inch bore capacity * Rear Main Seal: Offered in both 1-piece and 2-piece seal designs to accommodate different rotating assembly styles Critical features for builders: * Clearance: Cast-in clearance for up to a 3.875-inch stroke (select models clear up to 4.000-inches) * Oiling System: Uses a Priority Main Oiling system to ensure critical bearing surfaces receive oil first during high-RPM operation * Component Compatibility: Accepts standard OEM-style timing covers, oil pans, mechanical oil pumps (not included) * Machining Details: Lifter bores are machined to .8437-inches (+/- .0003-inch) and are compatible with OEM roller provisions * Additional Provisions: Blocks include a passenger-side dipstick and are drilled and tapped for mechanical fuel pumps and clutch linkages
Not Yet Reviewed
$2,299.99
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$3,999.99
BluePrint Engines Small Block Ford Compatible 302 Windsor Bare Engine Blocks
If you're ready to take your Ford small block to the next level, BluePrint Engines Small Block Ford Compatible 302 Windsor Bare Engine Blocks provide a rock-solid foundation your build deserves. Engineered to support stroker combinations up to 363 cubic inches, they deliver the strength, stability, and precision machining today's high-output Ford builds demand. Thick cylinder walls, reinforced casting, and smartly designed oiling pathways make them the ideal starting point for everything from a crisp street performer to a full-tilt track or autocross machine. Whether your vision is naturally aspirated punch or boosted aggression, BluePrint Engines Windsor based bare blocks give your project the durability and confidence to handle big power with classic Ford attitude. They are ideal for high-performance street, strip, or racing applications, providing a stronger foundation than original Ford cores. Key features and specifications: * Material: High-strength cast iron (EN-GJL-250) designed with thicker cylinder walls and significantly reinforced webbing compared to stock Ford blocks * Design: 4-bolt main caps (billet steel) and improved, thicker webbing, which allows for higher horsepower capacities without cracking * Dimensions: 8.200-inch deck height, 4.000-inch bore (can be bored further, with some versions supporting up to 4.125-inch or 4.165-inch max bore) * Suitability: Optimized for 302-based stroker combinations up to 363 cubic inches * Oiling System: Features priority main oiling for improved lubrication * Main Seal: 1-piece rear main seal design * Accommodates hydraulic roller cams, factory-style roller lifters, and standard timing covers (not included)
Not Yet Reviewed
$2,599.00
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$2,899.00
BluePrint Engines GM Big Block Compatible Bare Engine Blocks
When you're building big power, you need a block that's ready to carry the load—and the BluePrint Engines GM Big Block Compatible Bare Engine Blocks are engineered to take you all the way to a massive 598 cubic inches. Designed for serious street, strip, and marine performance, they deliver the strength, rigidity, and machining precision needed for high-horsepower combinations. Thick cylinder walls, robust main webbing, and smartly engineered oiling and cooling pathways give builders the confidence to push displacement and power further without sacrificing reliability. Whether you're crafting a torque-heavy cruiser or a high-rpm bruiser, the BluePrint Engines GM Big Block Compatible Bare Engine Blocks are a rock-solid starting point your big-inch Chevy build. Key technical specifications: * High-strength cast iron (EN-GJL-250) * Main caps: 4-bolt splayed (Ductile iron or Billet steel options) * Deck Heights: 9.800-inch or 10.200-inch * Bore Sizes: 4.500-inch or 4.600-inch (Siamese bores) * Rear Main Seal: 2-piece * Max Displacement: capable of up to 632+ cubic inches * Max Stroke: 4.750-inches * Weight: approximately 240-260 lbs. (with caps) * Features: Priority main oiling, extended cylinder skirts for stroker clearance, and .310 inches nominal wall thickness at max bore
Not Yet Reviewed
$3,999.00
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$4,799.99
BluePrint Engines GM LS Compatible Bare Engine Blocks
Whether you're assembling a torque-rich street monster, a boosted track bruiser, or a no-compromise stroker setup, BluePrint Engines GM LS Compatible Bare Engine Blocks give you the headroom and confidence to push your LS platform far beyond stock limits. These bare engine blocks are high-strength, cast-iron, aftermarket foundations designed for high-horsepower, boosted, or stroker applications up to 519+ cubic inches. With reinforced architecture, thick cylinder walls, and precision-machined surfaces, they deliver the rigidity and reliability needed for high-horsepower, high-rpm combinations. Big inches, big power, and rock-solid dependability start right here with GM LS bare engine blocks. Key features and options for BluePrint LS-compatible blocks include: * Cast iron with Siamese cylinder bores for maximum strength * Compatible with LS3 and LSX components * Structure: Reinforced main webbing, thick cylinder walls, and 6-bolt billet main cap design on some models * Stroke/Bore: Extended 5.75-inch cylinder skirts for longer strokes (up to 4.185-inch bore) * Design enhancements include priority main oiling, 4-corner steam ports, and improved water jackets for better cooling * Deck Heights: options include 9.240-inch and 9.705-inch * Available in 4.000-inch and 4.125-inch bore options * Cylinder Wall Thickness: 0.210-inch to 0.230-inch * Oiling System: priority main oiling with center crossover * Weight: approximately 240 lbs.
Not Yet Reviewed
$4,799.99
BluePrint Engines Small Block Ford Compatible 351 Cleveland Bare Engine Blocks
If you're ready to take your Ford small block to the next level, the BluePrint Engines Small Block Ford Compatible 351 Cleveland Bare Engine Blocks provide the rock-solid foundation your build deserves. Engineered to support stroker combinations up to 363 cubic inches, they deliver the strength, stability, and precision machining today's high-output Ford builds demand. Thick cylinder walls, reinforced casting, and smartly designed oiling pathways make it the ideal starting point for everything from a crisp street performer to a full-tilt track or autocross machine. Whether your vision is naturally aspirated punch or boosted aggression, the BluePrint Engines Small Block Ford Compatible 351 Cleveland Bare Engine Blocks provide a stable, reliable foundation for serious power. Key features and specifications: * High-strength cast iron (EN-GJL-250) with reinforced webbing for superior durability * The blocks feature Siamese cylinder walls that are significantly thicker than stock (nominal wall thickness of 0.250-inch) to support larger bores and high cylinder pressure * Enhanced deck and bell housing for improved head gasket sealing and additional webbing at the rear to help prevent bellhousing flange cracking * Ductile cast iron 4-bolt splayed main bearing caps for added bottom-end strength * Designed for 351 Cleveland main bearing bores and capable of supporting up to 460 cubic inch stroker assemblies * Fully machined with aligned-honed main bores, blind head bolt holes, and priority main oiling * Maximum Bore/Stroke: Supports up to 4.165-inch bore and 4.250-inch stroke * Uses a standard 2-piece rear main seal style * Designed with clearance reliefs for common aftermarket motor mounts and utilizes OEM-equivalent starters, fuel pumps, and oil pans (sold separately) * Compatible with standard 351 Windsor hydraulic roller camshafts and OEM-style retainers without needing retrofit hardware (cam/retainers not included)
Not Yet Reviewed
$3,599.00
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$4,399.99
