Product Summary

350, 383, Short Block Crate Engine Type

    Key Specs

    MFG. Part #BP38318SP
    BrandBluePrint Engines
    Crate Engine TypeShort Block
    Engine Displacement383 cu. in.

    Need To Know

    Truck Ship

    Truck shipments must be pre-paid with a credit card, certified check or money order

    Quick and Easy Returns

    Return Policy


    True Blue Power! BluePrints pro engine builders are enthusiasts just like you and it shows in the quality and performance of every engine they build. Each BluePrint crate engine is carefully dyno tested and ships with printed, proven results. If you’re looking serious horsepower at an affordable price, BluePrint Engines is the choice for you!

    GM 383 Short Block Plus


    • HP & Torque: 430 HP / 450 FT LBS
    • Compression Ratio: 10.0:1
    • Hypereutectic Pistons
    • Cast Steel Crank
    • Part #: BP38318SP
    • 4 Bolt main
    • 4.00" bore
    • Passenger side dipstick
    • Align honed main bearing bore
    Rotating Assembly
    • New cast iron crankshaft, 3.75" stroke
    • Hypereutectic pistons, 12CC Dish
    • New rods with 150,000 PSI bolts
    • Hastings moly rings
    • Melling high volume oil pump
    • Hydraulic roller cam
    • Heavy duty single roller timing set
    • Harmonic balancer
    Cam Specs
    • Cam Type: Roller, Lift with 1.6 rockers
    Ignition Timing
    • 34 degrees total (at 3500 RPM)
    Also Includes
    • Oil pan and timing cover
    • Brass freeze plugs
    • Dyno tested - shipped with results

    Bore and stroke combination makes this crate engine a 377ci displacement



    CARB Warning

    Follow EPA, CARB, and state regulations for engine changes

    Emissions warning: this part is for vehicle engine changes, not direct oem engine replacements. In California, engine changes are legal when done in compliance with California bureau of automotive repairs (bar) engine change policy. For assistance, call bar referee at: (800) 622-7733. And see https://bar.Ca.Gov/consumer/smog_check_program/engine_changes. All customers must comply with federal epa mobile source enforcement memorandum no. 1a (and addendum) and all applicable state regulations when conducting engine changes. Improper installation and/or use of this part in California may subject the installer and/or owner to a $37,500 penalty per violation per vehicle, revocation of registration, loss of use on California public right of ways, and proof of correction for tampering. There are similar restrictions and penalties under federal law and laws of all states for use of this engine change part on makes or models of vehicles that render them noncompliant with applicable state and/or federal emission laws with penalties under federal law of up to approximately $45,268 per tampered vehicle and/or engine


    MFG. Part #BP38318SP
    BrandBluePrint Engines
    Crate Engine TypeShort Block
    Engine Displacement383 cu. in.
    Horsepower430 horsepower
    Compression Ratio10.0:1
    Torque450 ft./lbs.
    Camshaft TypeHydraulic Roller Tappet
    Piston MaterialHypereutectic Aluminum
    Crankshaft MaterialCast Iron
    Camshaft Duration (.050 in)221° intake / 226° exhaust
    Camshaft Lift (in).528 intake / .536 exhaust
    Bore x Stroke (in)4.000" x 3.750"
    Intake Manifold IncludedNo
    Distributor IncludedNo
    Valve Covers IncludedNo
    Cylinder Heads IncludedNo
    Rear Main Seal Style1-piece
    Oil Pan IncludedYes
    Timing Cover IncludedYes
    Water Pump IncludedNo
    Harmonic Balancer IncludedYes
    Flexplate IncludedNo
    Flywheel IncludedNo
    Air Cleaner IncludedNo
    Spark Plugs IncludedNo
    Spark Plug Wires IncludedNo
    Camshaft IncludedYes
    Lifters IncludedNo
    Block4 bolt main
    NotesActual displacement 377 cubic inches. Horsepower numbers are with H8002K cylinder heads installed. Recommended oil for your BluePrint Crate Engine: 10W30, Non-Synthetic, Not for EGR