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Horsepower: 406 HP

Torque: 541 LB-FT

A Powerful Alterative to Rebuilding

When it comes to repowering your trusted Big-Block-powered pulling truck, don’t bother with the time it takes for rebuilding, when Chevrolet Performance’s HT502 offers an affordable, durable and powerful alternative.

It is built with a brand-new, latest-generation cylinder block with four-bolt main caps and features an all-forged rotating assembly for strength. A mild 8.75:1 compression ratio also makes it suitable for pump gas at all elevations. The assembly comes with the heads and a balancer installed. An induction system, ignition, starter, water pump and other accessories are required to finish the engine. All of the necessary components are available from Chevrolet Performance.

INSTALLATION NOTES

• Requires the addition of carburetor, intake manifold, water pump, fuel pump, starter, distributor and ignition system (not included)
• Clutch linkage bosses are now drilled and tapped. When using cast-iron exhaust manifolds, lower head bolts may need to be replaced with bolts with shorter heads, for clearance
• 502 engines now have a mechanical fuel pump boss! (NOTE: There is NO fuel pump lobe behind the boss.)
• Comes with an externally balanced 14" automatic transmission flexplate; Use externally balanced flywheel P/N 14096987 and 11" clutch assembly for manual transmission applications
• Not intended for marine applications

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TECH SPECS
Part Number: 19433156
Engine Type: Chevy Big-Block V-8
Displacement (cu in): 502
Bore x Stroke (in): 4.470 x 4.00
Block (P/N 19170540): Cast iron with 4-bolt main caps
Crankshaft (P/N 10183723): Forged steel
Connecting Rods (P/N 19170198): Forged steel, shot peened
Pistons (P/N 12533507): Forged aluminum
Camshaft Type (P/N 12552296): Hydraulic roller
Valve Lift (in): .480 intake / .483 exhaust
Camshaft Duration (@.050 in): 204° intake / 208° exhaust
Cylinder Heads (P/N 12562917): Iron oval port; 118cc chambers
Valve Size (in): 2.07 intake / 1.73 exhaust
Compression Ratio: 8.75:1
Rocker Arms (P/N 19260993): Stamped steel
Rocker Arm Ratio: 1.7:1
Recommended Fuel: Regular pump
Ignition Timing: 34° Total @ 4,000 rpm
Maximum Recommended rpm: 5,500
Balanced: External
Flexplate (P/N 10185034): 14"
NOTE: Distributor with melonized steel gear MUST be used with long-blocks and partial engines with steel camshafts, or engine damage will occur.