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Old 06-23-2026, 08:05 AM
bassbus bassbus is offline
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Default 67 GTO Vacuum Modulator Line routing? clip, need photos

I'm installing a proper vacuum modulator line on my 67 GTO Auto w/ AC. Previously someone just used rubber vacuum hose. It is confusing how the new pre-bent line is mounted and routed down the intake and back of engine down to the modulator valve on the transmission. Which side of coil does it go past? Driver's or Passenger's side of coil? Is there a bracket, bolt,? where does it attach? How does it weave in between the transmission oil cooling lines? Photos would really be appreciated showing routing and mounting. Many Thanks!!!

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Old 06-24-2026, 06:06 AM
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Jeff Hamlin Jeff Hamlin is offline
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This may help a bit...


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Old 06-30-2026, 02:50 PM
bassbus bassbus is offline
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I have that diagram, problem is the line I got from Ames, would not route like that and reach the engine bolt for the clip. In-line tube's does and now I am fixed up. It still takes a little adjusting because today's vacuum modulators don't look like the originals, the connection is straight out and not off to the side the way the originals were.

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Old 07-10-2026, 04:50 PM
jhnichols2 jhnichols2 is offline
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Here are some photos from the assembly manual and my 67 w A/C.
Clip attaches to top right side of transmission using the trans to engine bolt.
Picture of modular on my car is original style and taken from under the car looking up.
To the best of my knowledge the reproduction line is not exactly like original and may need a little "tweaking". but will work well and should be close.
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Last edited by jhnichols2; 07-10-2026 at 05:07 PM.
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