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      Engine Cubic Inches = Bore (in.) X Bore (in.) X Stroke (in.) X number of Cylinders X .7854

      Engine Cubic Liters = Bore (mm) X Bore (mm) X Stroke (mm) X Number of Cylinders X .7854

      Find the Stroke When The Bore And Cubic Inches Is Known:
      Cubic Inches or Liters ÷ Bore ÷ Bore ÷ .7854 ÷ # of Cylinders
      Example: Chevy 350
      350 ÷ 4.000 = 87.5 ÷ 4.000 = 21.875 ÷ .7854 = 27.852 ÷ 8 = 3.482

      Find the Bore When The Stroke And Cubic Inches is Known:
      Cubic Inches or Liters ÷ Stroke ÷ .7854 ÷ # of Cylinders then find Square Root of This Answer
      Example: Chevy 350
      350 ÷ 3.480 = 100.575 ÷ .7854 = 128.056 ÷ 8 = 16.007