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Header design, need help filling in the blanks

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    Header design, need help filling in the blanks

    Trying to fill this out:
    Calculate Header Tube Length and Diameter - by Wallace Racing Home of Pontiac Powered Firebirds,Trans Ams,Pontiac Powered Dragsters,Pontiac Power Rules!



    Stroke: (Inches): 2.9527"
    Bore: (Inches): 3.3070"
    Number of Cylinders: 6
    Exhaust Valve Diameter: (Inches): 1.4173"
    Exhaust Valve Opening Point: (Degrees )
    Exhaust Valve Duration: (Advertised) 128
    Exhaust Valve Centerline: (Degrees)
    Peak Power RPM: 5800 rpm
    Volumetric Efficiency:

    Stroke and Bore and Peak power RPM and valve diameter is taken from here:


    Exhaust valve duration is 'assumed' from taking the formula from here:
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    (exhaust cam degrees = exhaust valve duration/2)

    Anyone know the rest?
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