Previous Thread
Next Thread
Print Thread
Page 1 of 2 1 2
A Body A/C firewall differences to non-A/C? #64864
05/27/08 10:19 PM
05/27/08 10:19 PM
Joined: Aug 2005
Posts: 697
Central IL
70Sbird Offline OP
mopar
70Sbird  Offline OP
mopar

Joined: Aug 2005
Posts: 697
Central IL
Is there any difference in the firewall (other than the obvious 2 holes for the A/C lines) on a 71 Demon? specifically the airbox mounting holes, countours etc.....in other words is there any reason you couldn't install a standard heater box assembly and controls in place of an A/C box in a car that came with factory air?

Thanks for any help

Re: A Body A/C firewall differences to non-A/C? [Re: 70Sbird] #64865
05/28/08 12:45 AM
05/28/08 12:45 AM
Joined: Jan 2003
Posts: 8,064
Arlington, Texas
earlybee Offline
master
earlybee  Offline
master

Joined: Jan 2003
Posts: 8,064
Arlington, Texas
Firewalls are the same just redrill/patch some holes.

Re: A Body A/C firewall differences to non-A/C? [Re: earlybee] #64866
05/28/08 12:53 AM
05/28/08 12:53 AM
Joined: Jan 2004
Posts: 1,230
Pittsburgh, PA
W
wayfarer1 Offline
pro stock
wayfarer1  Offline
pro stock
W

Joined: Jan 2004
Posts: 1,230
Pittsburgh, PA
I am planning on doing the same thing to my 72 Dart that orginally had A/C. The hole for the motor is much larger for the A/C box and of course the A/C lines. I am going to either make a reducer to make the motor hole match the size of the non-A/C motor or just graft in the heater section of the non-A/C firewall I have from a parts car so it looks more correct.

Joe


Current Project: 72 Roadrunner 340/727/Petty Blue/White Roof Strobe Stripe/Black Bucket Interior

71 Demon project
Re: A Body A/C firewall differences to non-A/C? [Re: earlybee] #64867
05/28/08 01:10 AM
05/28/08 01:10 AM
Joined: Jan 2003
Posts: 43,459
Round Lake Beach, Illinoisy
Rhinodart Offline
Rhinotruck
Rhinodart  Offline
Rhinotruck

Joined: Jan 2003
Posts: 43,459
Round Lake Beach, Illinoisy
Quote:

Firewalls are the same just redrill/patch some holes.




You couldn't be more wrong. I guess you never did this conversion. See the above response for correct info. It takes body work and welding skills to pull off this change. Besides the dozen or so holes that need filled, you need to weld in the correct heater motor mounting sheetmetal, get the correct assembly including controls, and change quite a few things on the engine of course, especially the pulley's and bracketsm not something an ametuer can pull off, make sure you have the skills or get someone who does to make it work correctly.


The funny thing about science is that if you change one miniscule parameter you change the entire outcome to the way you want it.

JB Rhinehart, Realist

A-Body's RULE!
Re: A Body A/C firewall differences to non-A/C? [Re: Rhinodart] #64868
05/28/08 01:20 AM
05/28/08 01:20 AM
Joined: Oct 2004
Posts: 1,074
So Cal, USA
Fab64 Offline
super stock
Fab64  Offline
super stock

Joined: Oct 2004
Posts: 1,074
So Cal, USA
Just curious, why do you guys want to get rid of the a/c? I've been thinking of adding a/c to my Barracuda.

Re: A Body A/C firewall differences to non-A/C? [Re: Rhinodart] #64869
05/28/08 02:38 AM
05/28/08 02:38 AM
Joined: Jan 2003
Posts: 8,064
Arlington, Texas
earlybee Offline
master
earlybee  Offline
master

Joined: Jan 2003
Posts: 8,064
Arlington, Texas
Quote:

Quote:

Firewalls are the same just redrill/patch some holes.




You couldn't be more wrong. I guess you never did this conversion. See the above response for correct info. It takes body work and welding skills to pull off this change. Besides the dozen or so holes that need filled, you need to weld in the correct heater motor mounting sheetmetal, get the correct assembly including controls, and change quite a few things on the engine of course, especially the pulley's and bracketsm not something an ametuer can pull off, make sure you have the skills or get someone who does to make it work correctly.


You can sell that story to your rich car restoring, #s matching boss but not to me. This is not brain surgery Mr. Engineer. Where there,s a will, there,s a way.

Re: A Body A/C firewall differences to non-A/C? [Re: earlybee] #64870
05/28/08 09:20 AM
05/28/08 09:20 AM
Joined: Aug 2005
Posts: 697
Central IL
70Sbird Offline OP
mopar
70Sbird  Offline OP
mopar

Joined: Aug 2005
Posts: 697
Central IL
Thanks for the replies,
Here is why I am asking. I know the blower motor hole is different, and there are two holes for the A/C lines. take a look at this car. did it have factory air, and now just heat?
Thanks
Ebay demon

Re: A Body A/C firewall differences to non-A/C? [Re: Fab64] #64871
05/28/08 09:32 AM
05/28/08 09:32 AM
Joined: Jan 2005
Posts: 3,312
Marine Corps Base Hawaii
DemonKyle Offline
USMC LCPL
DemonKyle  Offline
USMC LCPL

Joined: Jan 2005
Posts: 3,312
Marine Corps Base Hawaii
Quote:

Just curious, why do you guys want to get rid of the a/c? I've been thinking of adding a/c to my Barracuda.


Hell of alot more clearance to work on the engine. AC was the first thing to go on my car

Re: A Body A/C firewall differences to non-A/C? [Re: DemonKyle] #64872
05/28/08 11:05 AM
05/28/08 11:05 AM
Joined: Jan 2004
Posts: 1,230
Pittsburgh, PA
W
wayfarer1 Offline
pro stock
wayfarer1  Offline
pro stock
W

Joined: Jan 2004
Posts: 1,230
Pittsburgh, PA
Quote:

Here is why I am asking. I know the blower motor hole is different, and there are two holes for the A/C lines. take a look at this car. did it have factory air, and now just heat?





By the looks of the big round filler mounted around the motor, I would have to say that that car originally had A/C and someone removed it and installed a non-A/C heater box.

Joe


Current Project: 72 Roadrunner 340/727/Petty Blue/White Roof Strobe Stripe/Black Bucket Interior

71 Demon project
Re: A Body A/C firewall differences to non-A/C? [Re: 70Sbird] #64873
05/28/08 03:34 PM
05/28/08 03:34 PM
Joined: Jan 2003
Posts: 6,531
Jacksonville, FL
Chris2581 Offline
master
Chris2581  Offline
master

Joined: Jan 2003
Posts: 6,531
Jacksonville, FL
Looks like it had A/C at one time.


Nautilus Racing-
We use Superformance gaskets and Turbo Action converters/products.
Re: A Body A/C firewall differences to non-A/C? [Re: earlybee] #64874
05/28/08 07:33 PM
05/28/08 07:33 PM
Joined: Jan 2003
Posts: 43,459
Round Lake Beach, Illinoisy
Rhinodart Offline
Rhinotruck
Rhinodart  Offline
Rhinotruck

Joined: Jan 2003
Posts: 43,459
Round Lake Beach, Illinoisy
Quote:

Quote:

Quote:

Firewalls are the same just redrill/patch some holes.




You couldn't be more wrong. I guess you never did this conversion. See the above response for correct info. It takes body work and welding skills to pull off this change. Besides the dozen or so holes that need filled, you need to weld in the correct heater motor mounting sheetmetal, get the correct assembly including controls, and change quite a few things on the engine of course, especially the pulley's and bracketsm not something an ametuer can pull off, make sure you have the skills or get someone who does to make it work correctly.


You can sell that story to your rich car restoring, #s matching boss but not to me. This is not brain surgery Mr. Engineer. Where there,s a will, there,s a way.




Most people I have run into in this hobby that ask this kind of question REALLY don't know what is involved!


The funny thing about science is that if you change one miniscule parameter you change the entire outcome to the way you want it.

JB Rhinehart, Realist

A-Body's RULE!
Re: A Body A/C firewall differences to non-A/C? [Re: Rhinodart] #64875
05/28/08 11:59 PM
05/28/08 11:59 PM
Joined: Dec 2003
Posts: 16,844
Phoenix - surface of the sun
nomore65BelvJim Offline
I Live Here
nomore65BelvJim  Offline
I Live Here

Joined: Dec 2003
Posts: 16,844
Phoenix - surface of the sun
what differences were there in the different years/engine sizes A/C car firewalls?
IE: was the firewall cut the same on a 72 A body V8 as a 75 A body /6, both being A/C cars?

Re: A Body A/C firewall differences to non-A/C? [Re: nomore65BelvJim] #64876
05/29/08 12:26 AM
05/29/08 12:26 AM
Joined: Jan 2004
Posts: 1,230
Pittsburgh, PA
W
wayfarer1 Offline
pro stock
wayfarer1  Offline
pro stock
W

Joined: Jan 2004
Posts: 1,230
Pittsburgh, PA
There are no differences in how and where the heater box is mounted in a /6 A/C car versus a V8 A/C car. I parted a 74 /6 A/C Dart a few years back and the box was exactly the same and mounted in the same location as the 72 A/C car I have now. The 72 A/C /6 Scamp I had was the same as well.

The only difference is from A/C to non-A/C.

Joe


Current Project: 72 Roadrunner 340/727/Petty Blue/White Roof Strobe Stripe/Black Bucket Interior

71 Demon project
Re: A Body A/C firewall differences to non-A/C? [Re: wayfarer1] #64877
05/29/08 08:50 PM
05/29/08 08:50 PM
Joined: Sep 2007
Posts: 710
STEELER NATION!!!
Skeez Offline
Pretty in Pink
Skeez  Offline
Pretty in Pink

Joined: Sep 2007
Posts: 710
STEELER NATION!!!
Oh yes there ARE differences from year to year. Green car: 71 A/C, Blue car: 74 A/C.....totally different. Both are V8 cars




Re: A Body A/C firewall differences to non-A/C? [Re: Fab64] #64878
05/29/08 09:09 PM
05/29/08 09:09 PM
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
RapidRobert Offline
Circle Track
Happy Birthday RapidRobert  Offline
Circle Track

Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
Quote:

I've been thinking of adding a/c to my Barracuda.


me too. Today was the first humid day of 2008 here & as I was driving & feeling the stickiness of my skin to my clothes I know it's only going to be a matter of time before I am PRAYING for working ac


live every 24 hour block of time like it's your last day on earth
Re: A Body A/C firewall differences to non-A/C? [Re: Skeez] #64879
05/30/08 12:22 AM
05/30/08 12:22 AM
Joined: Dec 2003
Posts: 16,844
Phoenix - surface of the sun
nomore65BelvJim Offline
I Live Here
nomore65BelvJim  Offline
I Live Here

Joined: Dec 2003
Posts: 16,844
Phoenix - surface of the sun
Quote:

Oh yes there ARE differences from year to year. Green car: 71 A/C, Blue car: 74 A/C.....totally different. Both are V8 cars








here's a 75 /6 A/C

4461047-DSC01524.JPG (107 downloads)
Re: A Body A/C firewall differences to non-A/C? [Re: nomore65BelvJim] #64880
05/30/08 12:31 AM
05/30/08 12:31 AM
Joined: Dec 2003
Posts: 16,844
Phoenix - surface of the sun
nomore65BelvJim Offline
I Live Here
nomore65BelvJim  Offline
I Live Here

Joined: Dec 2003
Posts: 16,844
Phoenix - surface of the sun
And here's a 68 A/C...looks like 73-76 is different than 72 and back.

4461058-DSC03745.JPG (110 downloads)
Re: A Body A/C firewall differences to non-A/C? [Re: nomore65BelvJim] #64881
05/30/08 01:09 PM
05/30/08 01:09 PM
Joined: Jan 2004
Posts: 1,230
Pittsburgh, PA
W
wayfarer1 Offline
pro stock
wayfarer1  Offline
pro stock
W

Joined: Jan 2004
Posts: 1,230
Pittsburgh, PA
Quote:

And here's a 68 A/C...looks like 73-76 is different than 72 and back.




I said they were the same because that is what I remebered! The only main difference is the size and shape of the hole for the motor!

I bet you I can make a 72 and earlier A/C heater box work with little effort in a 73-76 car and vice versa! I am planning on grafting a 74 Duster non-A/C firewall section into my 72 and I will have very little problems doing this!

Last edited by wayfarer1; 05/30/08 01:11 PM.

Current Project: 72 Roadrunner 340/727/Petty Blue/White Roof Strobe Stripe/Black Bucket Interior

71 Demon project
Re: A Body A/C firewall differences to non-A/C? [Re: wayfarer1] #64882
05/31/08 12:28 AM
05/31/08 12:28 AM
Joined: Dec 2003
Posts: 16,844
Phoenix - surface of the sun
nomore65BelvJim Offline
I Live Here
nomore65BelvJim  Offline
I Live Here

Joined: Dec 2003
Posts: 16,844
Phoenix - surface of the sun
I'm not criticizing Joe!

it looks like the a/c and heater lines moved some as well as the size/shape change of the blower motor hole.
I'd like to see a 72 A/C firewall to figure out when the change occured(72 or 73). It appears they are the same 67(?) up to 71 at least and 73-76 were the same.
Did the change occur in 72 or 73 is what I'd like to know

Re: A Body A/C firewall differences to non-A/C? [Re: nomore65BelvJim] #64883
05/31/08 12:40 AM
05/31/08 12:40 AM
Joined: May 2007
Posts: 1,675
Mi.
G-Money1320 Offline
top fuel
G-Money1320  Offline
top fuel

Joined: May 2007
Posts: 1,675
Mi.
I have a 69 Dart that was an A/C car and I installed a non A/C heater box. I didnt cut up my fire wall, I made a plate the same shape as the opening and installed it that way. I will try to get pics tommorrow. If you didnt look really hard you wouldnt notice. And if I remember right I used 1 or 2 of the extra holes to run my tach and gauge wires through with body plugs. Greg


416 stroker from Nick at Compu-flow. 11.14 in full street trim. Seems like a new best every time out.
11.06 open headers----so far!!
Page 1 of 2 1 2






Powered by UBB.threads™ PHP Forum Software 7.7.1