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  #1  
Old 06-04-2013, 12:49 PM
71HO4SPD 71HO4SPD is offline
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Default 10SI to a 12SI
Will a 12SI alt. bolt up to the factory pontiac brackets...71-79?

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  #2  
Old 06-05-2013, 05:22 PM
'ol Pinion head 'ol Pinion head is offline
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Will right up, as mtg dimensions are the same. might PM Stellar about what is optimum for an alternator pulley.

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Old 06-05-2013, 07:58 PM
stellar stellar is offline
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Original pulley should also swap to the 12SI from the 10SI

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Old 06-05-2013, 11:34 PM
71HO4SPD 71HO4SPD is offline
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Thanks for the info. Sounds like an easy way to get more amps for a project I am putting together.

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