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SKU: 19433036

Extra cubic inches deliver greater torque for your truck


Got a pre-1980 GM truck with a tired Small-Block? Forget the rebuild or reconditioned used engine and take your trusty truck’s capability to the next level with our big-torque HT383 stroker crate engine.


Its extra displacement and unique parts are designed to build a wide, flat torque curve you simply won’t get with a stock-type rebuild.


The HT383 features a brand-new engine block with four-bolt mains — an upgrade for most production engines that came with two-bolt mains — along with a forged-steel crankshaft and a smooth hydraulic roller camshaft. Its 9.1:1 compression ratio allows it to run on regular unleaded gasoline, too.


We deliver the HT383 with an aluminum intake manifold, ready for you to swap over the accessories from your tired engine. It’s also backed by a 24-month/50,000-mile (80,000 km) limited warranty*.


*Whichever comes first.  See dealer for warranty details.

  • Horsepower

    323 HP

  • Torque

    444 LB-FT

  • Tech Specs

    Engine Type: Chevy Small-Block V-8

    Displacement (cu. in.): 383

    Bore x Stroke (in.): 4.000 x 3.800

    Block (P/N 88962516): Cast-iron with four-bolt main caps

    Crankshaft (P/N 12489436): 4340 forged steel

    Connecting Rods (P/N 12497624): Heavy-duty PM steel

    Pistons (P/N 12499103): Hypereutectic aluminum

    Camshaft Type (P/N 14097395): Hydraulic roller

    Camshaft Lift (in.): .431 intake / .451 exhaust

    Camshaft Duration (@.050 in.): 196° intake / 206° exhaust

    Cylinder Heads (P/N 12558060): Vortec iron; 64-cc chambers

    Valve Size (in.): 1.940 intake / 1.500 exhaust

    Compression Ratio: 9.1:1

    Rocker Arms (P/N 10089648): Stamped steel

    Rocker Arm Ratio: 1.5:1

    Water Pump (P/N 88894341): Cast iron

    Recommended Fuel: 87 octane

    Ignition Timing: Base 10° BTDC, 32° Total

    Maximum Recommended rpm: 5000

    Balanced: External

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