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Discussion Starter #1
If I do a 9 psi would I need to upgrade the engine,rear end or the auto transmission. I have basic bolt on and keep the motor in good shape
 

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You would wanna have a Posi rear atleast, I would do supporting upgrades just to be safe, THEN buy the Procharger and PSI to 15 or something. :D
 

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9psi is nothing to fret about
 
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