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Chevrolet Performance 19433156 HT502 Big Block 8.2L Long Block
Stop patching cracked castings with Chevrolet Performance HT502 19433156 iron blocks. This massive 502 CID heavy hauler runs 8.75:1 compression through rugged cast iron heads. Bolt down your transmission mounts.
- 406 HP generates extreme pulling power
- 541 TQ dominates steep highway hills
- 8.75:1 compression ratio burns regular gas
Description
The massive towing requirements dictate the Chevrolet Performance 19433156 HT502 Big Block and its 8.2L displacement. Command immense pulling torque during heavy highway hauling. This build utilizes a reinforced cast iron foundation to deliver 406 HP reliably.
Key Features of Chevrolet Performance 19433156
- Cast Iron Gen VI Block (4-Bolt Main): Secures the rotating assembly under extreme load to prevent block distortion during heavy towing.
- Cast Iron Cylinder Heads (118cc Chambers): Retains intense combustion heat to maximize low-RPM torque output for heavy vehicle applications.
- Forged Steel 4.000″ Crankshaft: Absorbs severe torsional stresses to eliminate crankshaft flexing under heavy 502 CID loads.
- Forged Aluminum Pistons (8.75:1 Compression): Manages thermal expansion effectively to maintain optimal cylinder wall clearance on 87 octane pump gas.
- Hydraulic Roller Camshaft (.480″/.502″ Lift): Reduces internal valvetrain friction to deliver 541 lb-ft of torque precisely when hauling.
Component Breakdown: Base Long Block Configuration
This assembled base long block provides a formidable big block foundation for heavy truck repowers.
- A precision machined cast iron block houses a robust hydraulic roller camshaft designed to deliver massive off-the-line torque.
- Heavy duty cast iron cylinder heads improve overall thermal retention while the pre-installed oil pan seals the bottom end securely.
Vehicle Fitment & Compatibility Matrix
Engineered to drop seamlessly into classic Chevrolet truck engine bays this 8.2L block aligns perfectly with standard motor mounts. Sourcing one of our heavy-duty Chevy big block engines modernizes your towing rig instantly.
- Fits 1973-1987 Chevrolet C20 and C30 pickup trucks requiring massive towing capabilities.
- Fits 1973-1987 GMC Sierra 2500 and 3500 platforms looking for a direct fit premium replacement.
- Fits custom heavy-duty RV and motorhome chassis seeking an authentic 502 CID power upgrade.
Fuel & Ignition System Requirements
Feeding this classic big block engine demands proper fuel tuning and reliable high-voltage ignition components.
- A 750 CFM carburetor and upgraded fuel pump are required to supply the intake manifold while utilizing 87 Octane pump gas prevents pre-ignition.
- Heavy duty spark plug wires must be utilized alongside an aftermarket HEI distributor to maintain a powerful spark across the RPM band.
Installation, Break-In Oil & Priming Instructions
Proper initial startup procedures ensure the longevity of the hydraulic roller lifters and internal bearings.
- Transfer your existing intake manifold using fresh gaskets before manually priming the oil system with a dedicated priming tool until pressure is verified.
- Fill the crankcase with a high zinc break in oil and perform a varied RPM heat cycle before driving conservatively for the first 500 miles.
USA Warranty, Emissions & Logistics
Investing in this Chevrolet Performance crate engine secures peace of mind through comprehensive manufacturer backing.
- Backed by a strict 24-Month / 24,000-Mile manufacturer warranty this engine provides excellent protection against internal manufacturing defects.
- This assembly is not legal for sale or use on pollution controlled motor vehicles in California and ships securely via LTL freight.
Chevrolet Performance HT502 Long Block Crate Engines 19433156 Specs
| Brand | Chevrolet Performance |
| Engine Model | 19433156 |
| Part Type | Crate Engines |
| Product Line | Chevrolet Performance HT502 Long Block Crate Engines |
| Crate Engine Family | Chevy Big Block |
| Actual Engine Displacement | 8.2L/502 |
| Crate Engine Cylinder Head Material | Cast iron |
| Engine Block Material | Cast iron |
| Advertised Compression Ratio | 8.75:1 |
| Assembled | Yes |
| Engine Balance | External |
| Cam Style | Hydraulic roller, OE roller |
| Rear Main Seal Style | 1-piece |
| Intake Manifold Included | No |
| Cylinder Heads Included | Yes |
| Carburetor Included | No |
| Throttle Body Included | No |
| Distributor Included | No |
| Oil Pan Included | Yes |
| Valve Covers Included | Yes |
| Timing Cover Included | Yes |
| Water Pump Included | No |
| Harmonic Balancer Included | Yes |
| Flexplate Included | Yes |
| Flywheel Included | No |
| Air Cleaner Included | No |
| Spark Plugs Included | Yes |
| Spark Plug Wires Included | No |
| Computer Included | No |
| Wiring Harness Included | No |
| Supercharger Included | No |
| Warranty Info | 2 Years / 24,000 Miles Limited Warranty |
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