Description

BIG TORQUE FOR YOUR TRUCK
Got a pre-1980 GM truck with a tired Small-Block? Forget the rebuild and take your trusty truck’s capability to the next level with our big-torque HT383 crate engine. Its extra displacement and unique parts are designed to build a wide, flat torque curve that maintains at least 400 lb.-ft. between 2,500 and 4,000 rpm. The 323 hp and 444 lb.-ft. of torque is power you simply won’t get with a stock-type rebuild.
Built for true truck strength, the engine starts with a cast-iron block with four-bolt main caps – a strength-enhancing feature most production truck blocks don’t have. We then fill the block with a forged steel crankshaft and a smooth hydraulic roller camshaft, then top it off with iron Vortec heads. Its 9.1:1 compression ratio is perfect for regular gasoline at all altitudes and engine loads.
TECH SPECS
Part Number: 19332529
Engine Type: Chevy Small-Block V-8
Displacement (cu in): 383
Bore x Stroke (in): 4.005 x 3.800
Block (P/N 88962516): Cast-iron with 4-bolt main caps
Crankshaft (P/N 12489436): 4340 forged steel
Connecting Rods (P/N 19332460): 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; 64cc 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: Regular pump
Ignition Timing: 32° Total @ 4,000 rpm
Maximum Recommended rpm: 5,000
Balanced: External
Flexplate (P/N 14088765): 12.750″
Intake Manifold (P/N 12496820): Dual Plane Aluminum
INSTALLATION NOTES

  • Requires addition of carburetor, ignition 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
  • Designed for pre-1976 street vehicles or any off-road vehicle
  • Not intended for marine applications

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