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BluePrint Engines GM Small Block Compatible Bare Engine Blocks

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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 a

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

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