Thread: GT clarification
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Old 09-11-2012, 11:02 PM   #15
Ed Carpenter
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Default Re: GT clarification
Quote:
Originally Posted by jaf2021 View Post
In regular SS such as a ss/ia 66 chevy II 327/275 combo the hp rating for oem heads is 307 and replacement heads is 304. Does this make sense? jason
Auto 307
Stick 299

As stated before aftermarket head hasn't been hit yet.
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