Product Summary

Short Block Crate Engine Type, 9.5:1 Compression Ratio

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    Key Specs

    Crate Engine TypeShort Block
    Compression Ratio9.5:1
    Engine Displacement383 cu. in.
    Camshaft TypeHydraulic Roller Tappet
    Piston MaterialForged Aluminum
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    Need To Know

    Made to Order

    This custom item will ship when completed

    Truck Shipment

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

    Quick and Easy Returns

    Return Policy

    BluePrint Engines BP38321SP Details

    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

    Overview

    • HP & Torque: 432 HP / 450 FT LBS
    • Compression Ratio: 9.5:1
    • Forged Pistons
    • Forged Crank
    • Part #: BP38321SP
    Block
    • 4 Bolt main
    • 4.00" bore
    • Passenger side dipstick
    • Align honed main bearing bore
    Rotating Assembly
    • New forged crankshaft, 3.75" stroke
    • Forged pistons, 18CC Dish
    • Forged rods with 150,000 PSI bolts
    • Hastings moly rings
    • Melling high volume oil pump
    • Hydraulic roller cam
    • Heavy duty double roller timing set
    • Harmonic balancer
    Cam Specs
    • Cam Type: Roller, Lift with 1.6 rockers .528 Intake .536 Exhaust, 221 Intake / 226 Exhaust duration @ .050 - 110 degree lobe separation
    Ignition Timing
    • 34 degrees total (at 3500 RPM)
    Also Includes
    • Oil pan and timing cover
    • Brass freeze plugs
    • Dyno tested - shipped with results
    Notes

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

    Charts

    Warranty Information

    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

    BluePrint Engines BP38321SP Specifications

    KEY SPECS
    MFG. Part #BP38321SP
    BrandBluePrint Engines
    Crate Engine TypeShort Block
    Compression Ratio9.5:1
    Engine Displacement383 cu. in.
    Camshaft TypeHydraulic Roller Tappet
    Piston MaterialForged Aluminum
    Crankshaft MaterialForged Steel
    Carburetor IncludedNo
    Intake Manifold IncludedNo
    Distributor IncludedYes
    Connecting Rod MaterialForged Steel
    Valve Covers IncludedYes
    Engine BalanceInternal/External
    Cylinder Heads IncludedNo
    Rear Main Seal Style1-piece
    Throttle Body IncludedNo
    Timing Cover IncludedYes
    Oil Pan IncludedYes
    Water Pump IncludedNo
    Harmonic Balancer IncludedYes
    Flexplate IncludedNo
    Flywheel IncludedNo
    Air Cleaner IncludedNo
    Spark Plugs IncludedNo
    Spark Plug Wires IncludedNo
    Computer IncludedNo
    Wiring Harness IncludedNo
    GENERAL
    Torque450 ft./lbs.
    Horsepower432 horsepower
    Camshaft Duration (.050 in)221° intake / 226° exhaust
    Camshaft Lift (in).528 intake / .536 exhaust
    Bore x Stroke (in)4.000" x 3.750"
    WarrantyNone
    AssembledYes
    Camshaft IncludedYes
    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

    Questions & Answers

    4 Questions • 4 Answers

    Would this be a good solid engine for an '85 K20 square body truck that I'll tow and haul with sometimes?

    by Eric

    • a year ago

    1 answer

    Could you stick ik 200 heads on this and a small blower like the 142 street one. Part numbers escape me right now. Wonder how well it would hold up. Forged is good right? Ha

    by Hunter

    • 7 years ago

    1 answer

    What flex plate is required for this engine

    by Joe

    • 7 years ago

    1 answer

    Will this engine work for towing with Chevy fast burn, aluminum vortech bolt pattern heads and the '98 Vortec intake and factory top end basically? Is the cam too big for Vortec?

    by THOMAS

    • 7 years ago

    1 answer

    4 of 4 questions shown

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