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Converting an A/C firewall to Non A/C ? #2776344
05/20/20 01:08 AM
05/20/20 01:08 AM
Joined: Apr 2012
Posts: 1,235
Phoenix, AZ
Jjs72D Offline OP
Kerndog
Jjs72D  Offline OP
Kerndog

Joined: Apr 2012
Posts: 1,235
Phoenix, AZ
My '72 Duster is an original A/C car but I may consider an aftermarket kit to replace the stock system. The Classic Auto Air setups use a compact unit with the fan motor fully inside the car under the dash. The kit comes with block off plates but to me, they look bad. I want a smooth firewall or at least, something that looks cleaner.
My welding skills are limited but getting better. I am faced with maybe just making a sheet metal cover for the firewall and welding around the perimeter.
Any tips on what I should do? I'll have the seats and carpet out to avoid fires.

Re: Converting an A/C firewall to Non A/C ? [Re: Jjs72D] #2776360
05/20/20 05:25 AM
05/20/20 05:25 AM
Joined: Jun 2003
Posts: 2,227
Weatherford, Texas
RapidusMaximus Offline
top fuel
RapidusMaximus  Offline
top fuel

Joined: Jun 2003
Posts: 2,227
Weatherford, Texas
I converted a 67 Dart firewall from AC to non AC, got the non AC "plug" from the salvage yard and fitted it in as shown below...if I posted them correctly, first pic should be before, second pic during install and last pic when finished, hope this helps, up

1589966249046_20180928_202046-1.jpg1589966269208_20181226_144929-1.jpg20181227_132407-1.jpg

1968 Plymouth GTX 440 4 Speed Dana
1967 Small block Dart under construction (almost finished)
1974 Dodge P/U Long Bed Stepside 318 Auto
1976 D300 in work
1981 CJ 7
2016 Dodge Ram Hemi 1500
Re: Converting an A/C firewall to Non A/C ? [Re: Jjs72D] #2776375
05/20/20 08:15 AM
05/20/20 08:15 AM
Joined: Feb 2003
Posts: 8,187
A
Andrewh Offline
master
Andrewh  Offline
master
A

Joined: Feb 2003
Posts: 8,187
The stock under dash part is much better than the general one they make.

They also make "rebuild" supplies for the original a/c under dash parts.
The blower motor is better and the surface area is better.
You can just do the compressor portion and maybe new condenser and keep your under dash part if you can.

Re: Converting an A/C firewall to Non A/C ? [Re: Andrewh] #2776433
05/20/20 12:13 PM
05/20/20 12:13 PM
Joined: Jan 2003
Posts: 31,339
Grand Prairie,Texas
stumpy Offline
I Win
stumpy  Offline
I Win

Joined: Jan 2003
Posts: 31,339
Grand Prairie,Texas
What do you plan on doing for heat and defrost?

Re: Converting an A/C firewall to Non A/C ? [Re: stumpy] #2776571
05/20/20 07:23 PM
05/20/20 07:23 PM
Joined: Apr 2012
Posts: 1,235
Phoenix, AZ
Jjs72D Offline OP
Kerndog
Jjs72D  Offline OP
Kerndog

Joined: Apr 2012
Posts: 1,235
Phoenix, AZ
I plan to use an aftermarket kit from Classic Auto Air.

Re: Converting an A/C firewall to Non A/C ? [Re: Jjs72D] #2776576
05/20/20 07:43 PM
05/20/20 07:43 PM
Joined: Jun 2003
Posts: 18,822
It's a dry heat
gtx6970 Offline
I Live Here
gtx6970  Offline
I Live Here

Joined: Jun 2003
Posts: 18,822
It's a dry heat
if your going full aftermkt, I would just cut the old out and weld in a new flat plate to make a smooth firewall

Re: Converting an A/C firewall to Non A/C ? [Re: gtx6970] #2776621
05/20/20 10:21 PM
05/20/20 10:21 PM
Joined: Apr 2012
Posts: 1,235
Phoenix, AZ
Jjs72D Offline OP
Kerndog
Jjs72D  Offline OP
Kerndog

Joined: Apr 2012
Posts: 1,235
Phoenix, AZ
Thank you, that makes the most sense.







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