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GMC V6 and V12 Engines Engine repair and rebuilding

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  #1  
Old March 7th, 2021, 10:08 PM
HOTRODJOHN HOTRODJOHN is offline
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Default Exhaust ports/ headers.

Besides for size, are all the exhaust ports in the same configuration as the 305's.I am almost done with a set of headers and am wondering if they would fit all the V-6's. Also, how about 4 wheel drives and stick vehicles, for obstruction. With in the next several weeks I should have them ready to have it sourced out some low quantity build. I am not sure if there is any interest in them or does everyone want factory items. Any help you guys can give me would be greatly appreciated, John.
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Old March 8th, 2021, 03:22 AM
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Funky61 Funky61 is offline
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Default Re: Exhaust ports/ headers.

HOTRODJOHN,

Will you be making sets for the magnum heads?

Are the ones you are building now like shorty headers?

Any pics yet?
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Old March 8th, 2021, 09:42 PM
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Default Re: Exhaust ports/ headers.

As I understand it there are basically two different type of heads. The 305 version and the magnum version. I sure someone in the group can offer more info. Magnum version has larger intake and exhaust ports.
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Old March 9th, 2021, 12:08 AM
HOTRODJOHN HOTRODJOHN is offline
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Default Re: Exhaust ports/ headers.

So far I am doing a set for a 305 and I guess I am going to get a set of Magnum exhaust gaskets, to see the major difference. I have 2 305's myself so I will be doing them first and when I am close to being done I will post photos. They will be long headers. Thanks for the feed back. John
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