454 HO Tech Specs

• Part Number: 12568774              

• Engine Type: Chevy Big-Block V-8

• Displacement (cu. in.): 454

• Bore x Stroke (in.): 4.250 x 4.000

• Block (P/N 19170538): Cast-iron with four-bolt main caps

• Crankshaft (P/N 14096983): Forged steel

• Connecting Rods (P/N 19170198): Forged steel

• Pistons (P/N 10215228): Forged aluminum

• Camshaft Type (P/N 24502611): Hydraulic roller

• Camshaft Lift (in.): .510 intake / .540 exhaust

• Camshaft Duration (@.050 in.): 211° intake / 230° exhaust

• Cylinder Heads (P/N 12562920): Iron rectangular port; 118-cc chambers

• Valve Size (in.): 2.190 intake / 1.880 exhaust

• Compression Ratio: 8.75:1

• Rocker Arms (P/N 12523976): Stamped steel

• Rocker Arm Ratio: 1.7:1

• Water Pump (P/N 19168606): Cast-iron, long-style

• Flexplate (P/N 10185034): 14"

• Recommended Fuel: Premium pump

• Ignition Timing: 36° Total @ 4,000 rpm

• Maximum Recommended rpm: 5500

• Balanced: External