Thread: 572/620 hp How high can it rev
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	07-14-2009 10:43 AM #1572/620 hp How high can it rev
 
 I have a 572/620 h.p gm crate engine. I put a 1000 hp Holley on it. Using it mostly for drag racing. Does anyone have any experience with this engine as far as what it can safely rev to. GM says 6000 rpm. It has a hydraulic roller cam
 Thanks,Terry
 





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I'm happy to see it back up, sure hope it lasts.
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