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    Results 1 to 16 of 16
    1. #1
      Join Date
      Jun 2018
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      Alamo, CA USA
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      Country Flag: United States

      Firewall holes closed up...

      I have to plug some holes in my '73 Camaro that aren't going to be used before I can get my engine back in there. I'm using a Vintage Air system and am being told the four holes in green can be closed up. Can you guys help me verify this? Is there anything else I should close up while getting this work done?

      Click image for larger version. 

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      1973 Camaro: LS427/570, T56, Speedtech ExtReme subframe/torque arm

    2. #2
      Join Date
      Apr 2021
      Posts
      6
      Assume you are going to make a new hole for the Vintage Air bulkhead?

    3. #3
      Join Date
      Jun 2018
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      Quote Originally Posted by cheapdate88 View Post
      Assume you are going to make a new hole for the Vintage Air bulkhead?
      I thought the entire VA system runs through the big hole directly next to the passenger side front fender (not pictured here). No?
      1973 Camaro: LS427/570, T56, Speedtech ExtReme subframe/torque arm

    4. #4
      Join Date
      Nov 2006
      Location
      Mountain Springs, Texas
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      You can close up all those holes if you are routing your hoses through the blower hole on the far passenger side.

      Don
      1969 Camaro - LSA 6L90E AME sub/IRS
      1957 Buick Estate Wagon
      1959 El Camino - Ironworks frame
      1956 Cameo - full C5 suspension/drivetrain

    5. #5
      Join Date
      Jun 2018
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      Alamo, CA USA
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      Quote Originally Posted by dhutton View Post
      You can close up all those holes if you are routing your hoses through the blower hole on the far passenger side.

      Don
      Thanks, Don. Any other to include or are those the four to attack?
      1973 Camaro: LS427/570, T56, Speedtech ExtReme subframe/torque arm

    6. #6
      Join Date
      Nov 2006
      Location
      Mountain Springs, Texas
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      You can likely fill the rest of those small holes unless you are planning to use the factory firewall insulation.

      Don
      1969 Camaro - LSA 6L90E AME sub/IRS
      1957 Buick Estate Wagon
      1959 El Camino - Ironworks frame
      1956 Cameo - full C5 suspension/drivetrain

    7. #7
      Join Date
      Feb 2013
      Posts
      688
      Country Flag: United States
      The four holes on the passenger side are my Vintage Air pass throughs. The one below that is the bulkhead terminal for the trunk battery.
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    8. #8
      Join Date
      Jun 2018
      Location
      Alamo, CA USA
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      221
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      Quote Originally Posted by dhutton View Post
      You can likely fill the rest of those small holes unless you are planning to use the factory firewall insulation.

      Don
      Well I'm planning to use insulation of some kind. whether it's factory or not, I'm not sure. There hasn't been much put on this car that's factory.
      1973 Camaro: LS427/570, T56, Speedtech ExtReme subframe/torque arm

    9. #9
      Join Date
      Jun 2018
      Location
      Alamo, CA USA
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      Quote Originally Posted by JustJohn View Post
      The four holes on the passenger side are my Vintage Air pass throughs. The one below that is the bulkhead terminal for the trunk battery.
      Is that where VA wants you to run their equipment? I always thought it was run through the larger circular hole closer to the fender.
      1973 Camaro: LS427/570, T56, Speedtech ExtReme subframe/torque arm

    10. #10
      Join Date
      Feb 2013
      Posts
      688
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      Quote Originally Posted by roguegeek View Post
      Is that where VA wants you to run their equipment? I always thought it was run through the larger circular hole closer to the fender.
      You can technically run them anywhere you want. Also keep in mind the firewall picture is my 69 Impala so the scale is somewhat different. My AC hoses run inside the fender and those holes are where they need to be for the lines to exit the fender and go through. If I ran through the large vent hole they'd cross out midway through the footwell.

      Unfortunately the car is apart at the paint shop right now and I can't show you how it looks assembled.



    11. #11
      Join Date
      Apr 2001
      Location
      The City of Fountains
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      15,661
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      The hole towards the middle, above the transmission tunnel is perfect for your EFI harness.

      Andrew
      1970 GTO Version 2.0
      1967 Cougar build
      GM High-Tech Performance feature
      My YouTube Channel Please Subscribe!
      Instagram @projectgattago
      Dr. EFI
      I deliver what EFI promises.
      Remote Holley EFI tuning.
      Please get in touch if I can be of service.

      "You were the gun, your voice was the trigger, your bravery was the barrel, your eyes were the bullets." ~ Her

    12. #12
      Join Date
      Jun 2018
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      Quote Originally Posted by andrewb70 View Post
      The hole towards the middle, above the transmission tunnel is perfect for your EFI harness.

      Andrew
      I was wondering about that. Thanks so much for bringing it up. The Terminator X Max is basically being placed right behind it on the firewall, yeah? For people who do block off that hole, where do they normally run the harness?
      1973 Camaro: LS427/570, T56, Speedtech ExtReme subframe/torque arm

    13. #13
      Join Date
      Apr 2001
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      The City of Fountains
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      Quote Originally Posted by roguegeek View Post
      I was wondering about that. Thanks so much for bringing it up. The Terminator X Max is basically being placed right behind it on the firewall, yeah? For people who do block off that hole, where do they normally run the harness?
      That location is perfect for the harness. I just got these for my GTO:



      These are heat shrink harness passthroughs. I plan to use the large one for the harness. It fits a 2" hole.

      Andrew
      1970 GTO Version 2.0
      1967 Cougar build
      GM High-Tech Performance feature
      My YouTube Channel Please Subscribe!
      Instagram @projectgattago
      Dr. EFI
      I deliver what EFI promises.
      Remote Holley EFI tuning.
      Please get in touch if I can be of service.

      "You were the gun, your voice was the trigger, your bravery was the barrel, your eyes were the bullets." ~ Her

    14. #14
      Join Date
      Dec 2006
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      Moving from Burbs of Detroit to my native homeland, the woods of Cascadia
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      Or put an amphenol type detachable connector. Unscrew the engine harness at the connector, flip the wire harness over the engine, and yard that hombre out
      Greg Fast
      (yes, the last name is spelled correctly)

      1970 Camaro RS Clone
      1984 el Camino
      1973 MGB vintage E/Prod race car
      (Soon to be an SCCA H/Prod limited prep)

    15. #15
      Join Date
      Aug 2007
      Location
      Central Wisconsin
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      42
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      Quote Originally Posted by andrewb70 View Post
      That location is perfect for the harness. I just got these for my GTO:



      These are heat shrink harness passthroughs. I plan to use the large one for the harness. It fits a 2" hole.

      Andrew
      Where are these from. I have never seen this style before.
      Tim Mc
      71 Cutlass
      66 Tempest
      65 cutlass
      15 BMW GSA

    16. #16
      Join Date
      Apr 2001
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      The City of Fountains
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      Quote Originally Posted by TimMC View Post
      Where are these from. I have never seen this style before.
      Made by TE Connectivity. Available from Waytek Wire and probably other sources.

      Andrew
      1970 GTO Version 2.0
      1967 Cougar build
      GM High-Tech Performance feature
      My YouTube Channel Please Subscribe!
      Instagram @projectgattago
      Dr. EFI
      I deliver what EFI promises.
      Remote Holley EFI tuning.
      Please get in touch if I can be of service.

      "You were the gun, your voice was the trigger, your bravery was the barrel, your eyes were the bullets." ~ Her