| 
   Horsepower: 
  620 @ 5500 
  Torque: 
  650 @ 4500 RPM 
  Max. Recommended RPM: 
  6000 
  Compression Ratio: 
  9.6:1 
  Block: 
  25534368 Four Bolt main, cast iron 
  Crankshaft: 
  88961554 Forged steel 
  Connecting Rods: 
  88962926 PM rods 
  Pistons: 
  88962925 Forged Aluminum 
  Camshaft:  
  88961557 Hydraulic roller 
  Lift .632" I, .632" E. 
  Duration @ .050: .254° I, .264° E. 
  Intake Manifold: 
  88961161 Aluminum dual plane 
   | 
  
   Distributor: 
  88961867 HEI 
  Cylinder Heads: 
  12499255   Aluminum 58cc combustion chambers 
  Rocker Arms: 
  14085759 
  Valve Lash: 
  Zero 
  Sparik Plugs: 
  FR5LS Gap .035 Rapid Fire #5 Gap .045 
  Fuel: 
  92 Octane 
  Ignition Timing: 
  10° BTDC @ 800 RPM 
  32° total @ 4000 RPM with vacuum advance disconnected 
   
  Information may vary with application. All specifications listed are based on
  the latest product information available at the time of publication. The
  right is reserved to make changes at any time without notice.  
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