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BPP12110342 Small Block Ford Bare Block, 4.125 in. Bore, 8.200 in. Deck, Windsor Cast Mains [1-Piece Rear Main]
InfoVehicle Info Needed
BLUEPRINT ENGINESPART NUMBER: 138-BPP12110342

BPP12110342 Small Block Ford Bare Block, 4.125 in. Bore, 8.200 in. Deck, Windsor Cast Mains [1-Piece Rear Main]

$2,59900
Truck Freight
ShippingShips on 11/30/2026
Lowest PriceLowest Price Guarantee

Ford Small Block
Bare Engine Block
  • Small Block Ford Compatible 302
  • 8.200 Deck x 4.000 Bore
  • SIAM
  • Ductile Cast Main Caps
  • 363 c.i. Maximum

    This Small Block Ford Compatible 302 bare block is cast from EN-GJL-250 Iron with a 8.200" +.005" / -.000" deck height and a 4.120" to 4.122" rough bore. It accepts up to a 4.165" bore and 3.400" stroke for as much as 363 cubic inches. The mains use ductile cast iron 4-bolt splayed caps with 7/16-14 Inner / 3/8-16 splayed fasteners.

    BluePrint Engines BPP12110342 Engine Block Features:

    • Deck height: 8.200" +.005" / -.000"
    • Rough bore: 4.120" to 4.122"
    • Maximum bore: 4.165"
    • Maximum stroke: 3.400"
    • Cylinder wall thickness: .160" nominal @ 4.165" bore
    • Main caps: Ductile Cast Iron 4-Bolt Splayed
    • Oil system: Priority Main
    • Weight with main caps: 170-190lbs

    BluePrint Engines BPP12110342 Installation Notes:

    • Timing cover: OEM
    • Oil pan: OEM
    • Oil pump: OEM
    • Starter: OEM
    • Cam bearings: Durabond 351HP
    • Head bolt threads: 7/16-14 x 1.35 Deep
    • Freeze/core plugs: 1-5/8" x 10 BPE # 10110016

      • Build It From the Foundation Up

      BluePrint Engines bare engine blocks give builders a premium starting point for high-performance street, strip, and marine combinations. Designed as serious foundations for popular GM, Ford, and LS-based platforms, these cast-iron blocks are engineered for strength, dimensional stability, and accurate machining so your rotating assembly, valvetrain, and sealing surfaces come together with confidence. With BluePrint’s modern manufacturing and in-house machining capabilities supporting consistent bore geometry and critical tolerances, you get a block that’s ready for a custom build path, from fresh stock-style replacements to large-displacement stroker projects.

    Part TypeEngine Block
    Product LineBlueprint Engines Bare Engine Blocks
    BrandBLUEPRINT ENGINES
    Package Height22.5
    Package Width26.0
    Package Length26.0
    Weight190.0 PG
    Part CategoryPerformance Parts
    QuantitySold Individually
    Part FitmentSemi Universal
    Deck Height8.200 in. +.005 in. / -.000 in.
    Engine Make/SizeFord Small Block
    Vendor Part NumberBPP12110342
    Package Qty1
    Package TypeEA
    Some parts are not legal for use in California or other states with similar laws / regulations
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