19355720 HT383 Performance Crate Engine

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  • Chevrolet Performance HT383 Crate Engine 19355720

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Item #: 19355720
Reg. Price: $6,410.96
Our Price: $5,048.63


19355720 Replaces 19332529 Chevrolet Performance HT383 Performance Crate Engine 
323 Horsepower:
HT 383 Small Block Power to Tow or Go

Specially tuned for torque.

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.

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.

The HT 383 is an ideal replacement for any 1977 and older carbureted engine or off road application.


Part Number: 19332529

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 4-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; 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



• Requires addition of carburetor, ignition and starter (not included)

• Rochester Quadrajet or Holley 670-cfm carburetor recommended

• Comes with 12.75" 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

Service Parts Listing

Create Your Own HT383 Turn-Key
Using the following parts listed below to create your own HT383 Turn-Key.


Terms and Conditions
Warranty Information
GM Performance Crate Engine Start-up Instructions

Click here to download Product Information Sheet

Fuel Pump: This HT383 engine does not include a fuel pump. The fuel system must be capable of supplying adequate fuel volume at a minimum of 6 psi pressure when the engine is operating at wide open throttle (WOT). A high volume, in-line electric fuel pump is available from GM Performance Parts, part number 25115899. This heavy duty pump flows 72 gallons per hour at 6-8 psi outlet pressure. Also, the HT383 engine has a provision for a mechanical fuel pump. There are two mechanical fuel pumps available from GM. Part number 12355612 is recommended for street performance. Part number 12355613 is recommended for competition.

Still have questions or want more information, Please call us at 847-752-6172



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