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Old 07/29/2013, 10:10 AM   #1
x-codegtcs
 
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AC Firewall Question

OK - so I am moving onto the AC unit...I am wondering if there were plugs for the firewall where the heater-only box mounted. If so, where do you get them? If not, how did Ford seal the cabin?

1967 390 GTA Fastback
1968 J-Code GT/CS (Under Restoration) http://68jcodegtcs.blogspot.com/
1968 GT500 Convertible Replica
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Old 07/29/2013, 10:39 AM   #2
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Bryce I pictured those parts in the AC parts I had and I think you said that you had them. Marty

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Old 07/29/2013, 10:41 AM   #3
x-codegtcs
 
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AC Firewall Question

I have the large gasket and two-piece metal plate, but they don't cover the 4 small bolt holes. Sorry - I wasn't very clear in my original post.

1967 390 GTA Fastback
1968 J-Code GT/CS (Under Restoration) http://68jcodegtcs.blogspot.com/
1968 GT500 Convertible Replica
1968 X-Code GT/CS (SOLD)
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Old 07/29/2013, 02:34 PM   #4
franklinair
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Are you adding A/C? IIRC, the 4 holes in the firewall are meant to accomodate either configuration: with A/C or without. The 2 holes inboard/vertical are for the non A/C configuration (heater only). The 2 holes horizontal/adjacent to evaporator lines & expansion valve holes are for an A/C configuration.
As far as plugs for unused firewall holes i've used the rubber body plugs. Worked out fine.

Neil
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Old 07/29/2013, 04:44 PM   #5
CougarCJ
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Quote:
Originally Posted by franklinair View Post
As far as plugs for unused firewall holes i've used the rubber body plugs. Worked out fine.

Neil
To add to what Neil said, they are 1 inch rubber plugs, numbered 377678.
Drake and Carpenter both reproduce them.

Scott Behncke
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West Coast Classic Cougar A good source for Mustang mechanical parts too.
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Old 07/30/2013, 05:04 PM   #6
dalorzo_f
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And in some cases you need to massage the holes and file a bit to get them to fit, as when punched out they sometimes get a bit of a "neck" which makes it hard to install the plugs flush..
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Old 07/30/2013, 05:21 PM   #7
x-codegtcs
 
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AC Firewall Question

I will try to get a photo of my firewall and ID the holes. I have plugged the heater hose holes already. It is the 4 bolt holes that the heater fan motor bolts to (for non-AC cars) that I am trying to figure out how to seal.

1967 390 GTA Fastback
1968 J-Code GT/CS (Under Restoration) http://68jcodegtcs.blogspot.com/
1968 GT500 Convertible Replica
1968 X-Code GT/CS (SOLD)
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Old 07/30/2013, 06:11 PM   #8
68sunlitgold
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Here is what mine looked like once I added factory A/C to my coupe. The holes to the right that now have plugs are where the heater core came through the firewall.

Doug
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1968 Sunlitgold 289 Coupe
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Old 07/30/2013, 06:17 PM   #9
CougarCJ
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Quote:
Originally Posted by x-codegtcs View Post
I will try to get a photo of my firewall and ID the holes. I have plugged the heater hose holes already. It is the 4 bolt holes that the heater fan motor bolts to (for non-AC cars) that I am trying to figure out how to seal.
The gasket and surrounding 2 piece plate for the factory A/C cover those holes.


Scott Behncke
1968 GT/CS 302-4V Honors flysis income beezis onches nobis inob keesis
West Coast Classic Cougar A good source for Mustang mechanical parts too.
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Old 07/31/2013, 09:03 PM   #10
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Everyone! THANK YOU! Doug and Scott - thanks for the photos. I found out that I am a complete moron - for like the 100th time while trying to put this car back together (some places like the 5th time). I had only put the rubber seal up to the fire wall and did not check fit the metal plates. The metal plates definitely cover the holes I ASSUMED that because the rubber gasket didn't cover the holes that the metal plate wouldn't either. Thanks again for helping a moron with his project!

1967 390 GTA Fastback
1968 J-Code GT/CS (Under Restoration) http://68jcodegtcs.blogspot.com/
1968 GT500 Convertible Replica
1968 X-Code GT/CS (SOLD)
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