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Old 08-19-2019, 06:24 PM
Terry M. Hunt Terry M. Hunt is offline
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Default A/C ducts interchangeability

Underdash ducts are missing from my ‘66. GTO. Did any other years use these same ducts? Would like to know this before I start my search for these.

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Old 08-19-2019, 06:31 PM
gtospieg gtospieg is offline
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I would think 67 is the same, not sure about 65 or 64, pretty sure 68 and later would be different

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Old 08-20-2019, 06:55 AM
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Jeff Hamlin Jeff Hamlin is offline
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Thumbs up AC DUCTS

'66 & '67 ARE INTERCHANGEABLE.
The '67 upper support on the main duct changed to a more user friendly install over the '66,
so you may have to modify this but otherwise it will be a direct fit.

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Last edited by Jeff Hamlin; 02-25-2024 at 11:11 AM.
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Old 08-20-2019, 08:04 AM
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Andre Andre is offline
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The ducts interchange from 64-67 with the exception of the duct that runs from the main distribution duct to the control head. 1694-5 are same, 1966-7 are same. The in dash round vents are different, but the lap vents are the same. If you need a few pieces, I have some, but the duct I mentioned seems harder to find.

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