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Discussion Starter #1
I’m planning to plug / close holes in my firewall, as most are missing or disintegrated. I just ordered the plugs for the heater holes, but can’t find the grommets for the vacuum lines that enter through the firewall for a 68 factory ac car. Any ideas where to buy or the size?
 

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Try a Ace Hardware first. They have all kinds of metal plugs and rubber grommets. If your lucky they will have one that will work. Take a vernier caliper and measure your hole openings and lock the caliper in that position. Then using the caliper find a matching size grommet/plug and you will have a perfect fit.
 

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Discussion Starter #3
Thanks. Didn’t know if there was anything Mustang-specific, off the shelf.
 

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Discussion Starter #4 (Edited)
Finally got around to sourcing and installing some grommets in the firewall for the HVAC vacuum lines. Thought I’d share. These are from a Ram-Pro 125pc kit on Amazon.



 
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