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#1 |
Senior Member
Join Date: Jul 2006
Location: Midlothian TX
Posts: 324
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67-72 Non-Factory A/C Conversion to Factory A/C Firewall Questions????
Do you have to have a donor firewall to make the factory A/C work? If not, do you have to weld in a piece of metal to fill in the existing hole and then cut out for the factory A/C firewall hole, or can you modify the existing one????? If so, what is the best way to modify it?
thanks Last edited by kna4977; 08-09-2006 at 09:16 PM. |
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#2 |
"Trucks with Class"
![]() Join Date: Jul 2000
Location: OLYMPIA, WA, USA
Posts: 8,132
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Re: 67-72 Non-Factory A/C Conversion to Factory A/C Firewall Questions????
I have done several and the AC box will go on the firewall and cover the non-AC big holes and function just fine...no need to weld in the slightly larger AC holes.
When you set the AC box up to the firewall it will show you where to drill the little holes for the bolts around the box. From there you just install everything like the original. Here's one I have been driving for years...still blows cold...never cut or welded the firewall and didn't even pull the dash. |
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#3 |
It's a catastrophic success.
![]() Join Date: Jan 2003
Location: Oklahoma
Posts: 2,077
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Re: 67-72 Non-Factory A/C Conversion to Factory A/C Firewall Questions????
Here are the differences
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#4 |
Senoir Member
Join Date: Mar 2002
Location: Rock Hill, SC USA
Posts: 1,214
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Re: 67-72 Non-Factory A/C Conversion to Factory A/C Firewall Questions????
pickmup, Do you have to install the 2 dampers....inside cab on vent damper and under the hood in the cowl??? I trying to decide on factory or aftermarket a/c on a non a/c factory bigblock numbers matching shortbed. Any info or thoughts would be great. Thanks, Greg
__________________
67 Chevy, Small back glass, Factory 4WD, Factory Shortbed, Factory V8, Lifted 4" 70 GMC Sierra Grande, Factory Shortbed, Factory 402/400 turbo, Super Custom Interior. Numbers matching with SPID & Build Sheet. 68K Original Miles. Restored 2010 70 GMC Restoration Pictures http://67-72chevytrucks.com/gallery/...00&ppuser=4424 |
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#5 | |
Senior Member
Join Date: Jul 2006
Location: Midlothian TX
Posts: 324
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Re: 67-72 Non-Factory A/C Conversion to Factory A/C Firewall Questions????
Quote:
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#6 | |
Senior Member
Join Date: Jul 2006
Location: Midlothian TX
Posts: 324
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Re: 67-72 Non-Factory A/C Conversion to Factory A/C Firewall Questions????
Quote:
I've been told that you don't really need the one from inside the cab, and that it never worked all that well anyway |
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#7 | |
Senior Member
Join Date: Jul 2006
Location: Midlothian TX
Posts: 324
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Re: 67-72 Non-Factory A/C Conversion to Factory A/C Firewall Questions????
Quote:
If you are a guy that really likes the look of the original system, and don't mind a little hard work, go original. If you don't care about the look and want something that is functional, costs a little more, and is easier to install, go aftermarket. Last edited by kna4977; 08-11-2006 at 11:20 PM. |
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