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Old 02-26-2024, 01:10 PM
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65madgoat 65madgoat is offline
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Default Photos of 1972 455HO intake installed / heat riser to heads


Anyone have photos they can post of their 1972 455HO intake manifold installed with cast iron exhaust crossover underneath so I can see how that crossover looks mounted to the heads. I seem to have a gap to the holes in the factory round port heads when the OEM iron crossover is on there. Unsure how it is to look....


Last edited by 65madgoat; 02-26-2024 at 01:23 PM.
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Old 02-26-2024, 02:21 PM
Baron Von Zeppelin Baron Von Zeppelin is offline
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Those heads have a blind hole above the center heat passages - if that is the issue.
Its just a blank hole that does nothing .
Picture from eBay to illustrate.


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Old 02-26-2024, 02:24 PM
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4birds 4birds is offline
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Default 72 455HO

The open hole in the head above the crossover is correct.
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Old 02-26-2024, 02:50 PM
Baron Von Zeppelin Baron Von Zeppelin is offline
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Great pictures 4birds

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Old 02-26-2024, 02:53 PM
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65madgoat 65madgoat is offline
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Awesome pictures!! THANK YOU!!

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Old 02-26-2024, 02:56 PM
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The open passage above the exhaust crossover port that leads to nowhere has an actual purpose.

That purpose would be to isolate the hot upper wall of the exhaust crossover port from the the oil underneath the valve cover, aong with confusing home mechanics in the future of course.

As long as the exhaust crossover ports in the head and intake line up and seal that other open hole matters not.

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