GM Performance 25534446 Vortec Large Port
Which head porter has a lot of R&D with these castings?max effort porting but no welding is allowed,need to make 2.3hp per cube .single cast manifold, compression unlimited,flat tappet cam. 320cid
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Re: GM Performance 25534446 Vortec Large Port
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I'd call Slawko. |
Re: GM Performance 25534446 Vortec Large Port
As I understand, Glenn Knowlton in Minnesota did the cylinder heads for the SS/CS Firebird owned by Randy and Michael Mans.
I been told Glenn passed away earlier this year; however, there amy be someone still running his shop. |
Re: GM Performance 25534446 Vortec Large Port
Hettler has a program
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763-784-0687 |
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Is he running his own shop ? :cool: |
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Pretty much just does cylinder heads.. |
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