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#1 |
E.H.F.D Engine #2
Join Date: Feb 2003
Location: East Hampton, NY Long Island
Posts: 916
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Are these holes in my firewall from the factory?
I have 2 holes in the floor of the passenger side of my cab that are about 10" apart. Around where the passenger's feet would be if they had their legs straight out. They look exactly like the antenna hole thats on the upper cowl. (just looks like they blew through instead of drilling.) if they are stock, what are they for?? Thanks. Sorry for the crappy pictures...
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__________________
-NICK '72 K10 SWB Fleetside. Avocado Highlander 350-4speed-NP205 Frame Off Re-Creation '89 GMC V3500 C/C Flatbed Plow Truck 454/SM465/Np205 '15 Chevy 2500HD CCSB High Country Duramax '22 Tahoe Premier Duramax |
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#2 |
Registered User
Join Date: Feb 2012
Location: Mission Viejo, CA
Posts: 1,856
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Re: Are these holes in my firewall from the factory?
kind of looks like where the bolts that hold the heater core on my AC truck stick through and are impossible to get to without removing the inner fender. But dont quote me on that. I dont know what my firewall looks like that stripped down
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#3 |
Registered User
Join Date: Feb 2012
Location: Depew, OK
Posts: 204
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Re: Are these holes in my firewall from the factory?
Did the truck have a underdash ac unit?
__________________
~Jon Ol Green 1970 K10ish LWB,454/400/205, been in family since new.
My build thread http://67-72chevytrucks.com/vboard/s...d.php?t=516056 |
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#4 |
Registered User
![]() Join Date: Feb 2007
Location: Goodview VA
Posts: 27
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Re: Are these holes in my firewall from the factory?
i had 2 bullet holes in that same area
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#5 |
Registered User
Join Date: Jun 2008
Location: Moss Point,Ms.
Posts: 1,439
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Re: Are these holes in my firewall from the factory?
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#6 |
Registered User
![]() Join Date: Apr 2007
Location: Foster Rhode Island
Posts: 1,176
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Re: Are these holes in my firewall from the factory?
The cab Im fixing now has those same holes in the floor and there was an underdash ac unit in it when I got it.Looks like someone punched them through with a slag pick. I used a hammer and a dolly and flatend the right one out so I could weld it up. TThis picture is upside down,cant figure the stupid I pod out when you e mail pictures sometimes there upside down. You see what I mean anyway,I think its for a drain.
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#7 |
Registered User
Join Date: Jun 2008
Location: Moss Point,Ms.
Posts: 1,439
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Re: Are these holes in my firewall from the factory?
That's why I had mine torn apart.Removing the old underdash a/c.
You can see the condensate drain hole in the hump area and the 2 holes for the lines above in the firewall pad. They're welded up now(along with the firewall mods) and the factory a/c is in. Mike. ![]() |
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#8 |
Registered User
Join Date: Sep 2011
Location: olathe kansas
Posts: 238
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Re: Are these holes in my firewall from the factory?
i wonder if thats were the studs were that hold the carpet in place I have two of them on the passenger side
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#9 |
E.H.F.D Engine #2
Join Date: Feb 2003
Location: East Hampton, NY Long Island
Posts: 916
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Re: Are these holes in my firewall from the factory?
I bought the cab bare so I don't know if it had AC under the dash. After reading through, I figure it must have. I also have 2 1" holes just to the right of the heater core box that must have been for the AC lines. I guess they're all going to get welded shut since the only air conditioning I'll have is rolling down the windows and opening the rear slider!
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__________________
-NICK '72 K10 SWB Fleetside. Avocado Highlander 350-4speed-NP205 Frame Off Re-Creation '89 GMC V3500 C/C Flatbed Plow Truck 454/SM465/Np205 '15 Chevy 2500HD CCSB High Country Duramax '22 Tahoe Premier Duramax |
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#10 |
Registered User
![]() Join Date: Apr 2007
Location: Foster Rhode Island
Posts: 1,176
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Re: Are these holes in my firewall from the factory?
Mine has those holes in the firewall too,near the heater core.
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#11 |
Registered User
![]() Join Date: Dec 2009
Location: Durham,NC
Posts: 636
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Re: Are these holes in my firewall from the factory?
I have got 2 similar holes on my pass side also like old chevy guy but the hole on left looks more round then his. I pan on filling them in myself.
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#12 |
Registered User
![]() Join Date: Apr 2007
Location: Foster Rhode Island
Posts: 1,176
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Re: Are these holes in my firewall from the factory?
The one thats not so round is because I flatend it out with a hammer and dolly so I could weld it up. Didn't get to the other one yet.
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#13 |
Registered User
Join Date: Nov 2011
Location: Idaho
Posts: 857
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Re: Are these holes in my firewall from the factory?
I have those same holes that your talking about. My truck isa 69 c/10 it has aftermarket a/c the two holes on the floor are drain holes for the condensate lines and the firewall are for the a/c line to pass through. My a/c unit is made by a company callead ARA and it has two drain going through the floor. It looks like they just drove some kind of chisel or large screwdriver throught the floor the didnt even use a drill bit back then.
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#14 |
Junior Member
Join Date: Mar 2007
Location: Hideaway, TX
Posts: 4,950
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Re: Are these holes in my firewall from the factory?
I bet is was underdash a/c.
__________________
71 Suburban 350/700R4 Project Trixie 72 CHEVY,Highlander,SWB,396,T400 |
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#15 |
Senior Member
![]() Join Date: Jul 2010
Location: Race City U.S.A.
Posts: 1,014
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Re: Are these holes in my firewall from the factory?
I discovered my truck used to have under dash A/C also. My floor board had the same hole. I used a rotabroach to get rid of the flaring and then inserted a nice thick grommet. Good for now since one side is covered by carpet and the other is covered by the inner fender.
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Board Member #87725 My build thread... http://67-72chevytrucks.com/vboard/s...d.php?t=813848 |
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#16 | |
E.H.F.D Engine #2
Join Date: Feb 2003
Location: East Hampton, NY Long Island
Posts: 916
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Re: Are these holes in my firewall from the factory?
Quote:
__________________
-NICK '72 K10 SWB Fleetside. Avocado Highlander 350-4speed-NP205 Frame Off Re-Creation '89 GMC V3500 C/C Flatbed Plow Truck 454/SM465/Np205 '15 Chevy 2500HD CCSB High Country Duramax '22 Tahoe Premier Duramax |
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#17 |
Registered User
![]() Join Date: Feb 2004
Location: El Cajon, Cal.
Posts: 75
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Re: Are these holes in my firewall from the factory?
Aftermarket under dash AC. Got one with a grommet and one looks like a bullet hole. Your earlier post made me look.
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__________________
Original owner '69 C20, long, fleet. 454 BB with Edelbrock stuff. Work truck for years, 2nd restoration going on. '69 C20 '03 Tahoe Z71 70 Hp Johnson pushing aluminum bass boat. All things in life are uncertain, so eat dessert first. ![]() ![]() |
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