Small-Block Crate Engines - HT383

Ready for a replacement? Forget the rebuild and take your vehicle’s capability to the next level with our big-torque HT383 crate engine. Its extra displacement and unique parts are designed to deliver a wide, flat torque curve that maintains at least 400 lb.-ft. between 2,500 and 4,000 rpm, with peak torque of 444 lb.-ft.!

That’s serious pulling power—and power that won’t come with a stock-type rebuild. The HT383 features a brand-new engine block with four-bolt mains (a strength-enhancing upgrade for most production engines, which came with two-bolt mains) along with a forged steel crankshaft (which includes a 4X crankshaft position sensor), and more. 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. See your dealer for complete details.

The HT383 is also available as a partial engine.

INSTALLATION NOTES

• Requires addition of carburetor, fuel pump, ignition system and starter (not included)
• Rochester Quadrajet or Holley 670-cfm carburetor recommended
• Comes with 12.750" externally balanced 153-tooth automatic transmission flexplate. Requires externally balanced flywheel for manual transmission.
• Has right-side oil dipstick
• Not intended for marine applications

TECH SPECS

• Part Number: 19433036
• Engine Type: Chevy Small-Block V-8
• Displacement (cu in): 383
• Bore x Stroke (in): 4.005 x 3.800
• Block (P/N 19433406): Cast iron with 4-bolt main caps
• Crankshaft (P/N 12489436): 4340 forged steel; includes 4X crankshaft position sensor
• Connecting Rods (P/N 19355718): Heavy-duty forged steel
• Pistons (P/N 12499103): Hypereutectic aluminum
• Intake Manifold (P/N 12496820): Dual plane aluminum
• Camshaft Type (P/N 14097395): Hydraulic roller
• Valve Lift (in): .431 intake / .451 exhaust
• Camshaft Duration (@.050 in): 196° intake / 206° exhaust
• Cylinder Heads (P/N 12691728): Vortec iron; 62cc chambers
• Valve Size (in): 1.940 intake / 1.500 exhaust
• Compression Ratio: 9.4:1
• Rocker Arms (P/N 10089648): Stamped steel
• Rocker Arm Ratio: 1.5:1
• Water Pump (P/N 12685965): Cast iron
• Recommended Fuel: Regular pump
• Ignition Timing: 32° Total @ 4,000 rpm
• Maximum Recommended rpm: 5,000
• Balanced: External
• Flexplate (P/N 14088765): 12.750"

NOTE: Distributor with melonized steel gear MUST be used with long-blocks and partial engines with steel camshafts, or engine damage will occur