Big Block pulleys

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dantegray

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Jan 12, 2010
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How do you get the right size pulleys? What is the magical math formula? What is the stock ratio?

I was looking at purchasing after market serpentine pulleys but not sure how to figure what I need. I don't want to my water pump or charging system to suffer.

I was looking at: Crank 6.0, water pump 5 3/4 or 4 7/8, alternator 2 1/2.

Will this work?
 
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