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BluePrint Engines BPS4250100S - Big Block Chevy 4.250" Bore Cast Iron Block - Standard Deck - 1pc Rear Main Seal

SDPC - Your Complete Performance Crate Engine Warehouse

Whether you're picking a block based on strength or displacement, BluePrint Engines offers a variety of Chevy big and small blocks for every price range. Our staff is ready to provide you with technical assistance and to answer your questions. 
Shipping: Free Shipping* On BluePrint Engines
Pricing: $2,099.00




  • Cast Iron

Cylinder Wall:

  • Siamese

Unfinished Bore:

  • 4.250"

Max Recommended Bore & Stroke:

  • 4.625"

Rear Main Seal:

  • 1 piece

    Deck Height:

    • 9.8

    Cam Bearing Bore ID:

    • 2.120" STD

    Cam Bearnings:

    • Not included, recommend Clevite SH617S

    Camshaft Position:

    • Standard

    Inside Head Stud Bosses:

    • Yes

    Lifter Bores:

    • Gen V, VI — Will accept link bar.

    Hydraulic Roller Provisions:

    • Gen V, VI — Will accept link bar.

    Main Caps:

    • Ductile Iron, 4 bolt splayed

    Oil System:

    • Main Priority Oiling, Wet or Dry Sump

    Fuel Pump Boss:

    • Yes

    Fuel Pump Pushrod:

    • Standard BBC

    Clutch Linkage Boss:

    • Yes


    • Standard location

    California Proposition 65

    California Prop 65WARNING: Cancer & Reproductive Harm -


    Shipping Information

    • Item Requires Shipping
    • 656.0 lbs.
    • W35.0000” x H44.0000” x L34.0000”
    • Free Shipping* On BluePrint Engines

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