Thread: Pontiac hardened valve seat issues
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  #59  
Old 02-19-2023, 07:02 PM
Steve Shively Steve Shively is offline
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Join Date: Jul 2002
Location: Kansas City, KS
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From what I have heard, Pontiac engine & heads were cast with a higher Nickle content, making it a harder steel. Conversely, Chevy stuff is cast with a softer steel. Porting Chevy stuff is so mush easier than Pontiac.

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