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Dude, my last car was a bone yard 5.0 stock ass bottom end and I had a 67mm precision on it making 10-12 lbs boost and that thing ran awesome! Just make sure timing and fuel are dialed and it should be alright. That motor made a lot of blow by but my theory is high mileage motor has pretty loose worn rings so alows blow by so they run strong and stay together. Just my :twocents:
 
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