HT383
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