Engine - Crate Engines - 454 HO Engine

From GM Performance - Horse power 425 @ 5250 RPM. Torque 500 @ 3250 RPM. Max Recommended RPM 5500. Compression Ratio 8.75:1. Block 12550307 Cast iron - four bolt mains. Crankshaft 14096983 forged steel. Connecting rods 10198922 forged steel. Pistons 10215228 forged aluminum. Piston rings 12523921. Camshaft 24502611 hydraulic roller loft: .510 inch I, .540 inch E. duration @ .050:211 degree I, 230 degree E. Timing chain 10114177 single roller. Cylinder heads 14096801 cast iron 118cc combustion chambers. Intake valves 14097045 2.19 inch. Exhaust valves 14097049 1.88 inch. Valve springs 14097002. Rocker arms 12523976 1:7.1. Flexplate 10185034. Torsional Damper 10216339 8 inch. Oil Pump Drive 3860365 Shaft and 3764554 sleeve. Valve lash net lash. Fuel 92 octane. Spark plugs MR43T Gap .035 #10 Rapid fire gap .035. Ignition timing 4 degree BTDC.