Using my A/C cab with non A/C heater box? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Patsfan34 · 09-19-2010, 08:51 AM

My 70 truck came with the A/C setup but I don't want to use that stuff. I haven't pulled the system out of the cab or off the firewall yet. There's a member selling a nice non A/C heater box that's about an hour from me for a good price so I'm just trying to get some answers so I don't hold him up. Assuming the non A/C heater box will bolt right in, is there any reason I shouldn't buy his setup and put it in my truck and then sell my A/C heater box set up complete? Or am I wasting my money and I could just take the stuff I need from my A/C setup now and break it up and use the heater box and blower and sell just the A/C portion of my set up? I hope that made sense!

Thanks, Neil

c1069 · 09-19-2010, 03:53 PM

this it what i find IMO need modification,

Dark Knight · 09-19-2010, 04:44 PM

You don't have to modify the firewall. I put factory A/C in my non-A/C truck with no modifications. Everything works fine. The cold is cold and the hot is...well...ROASTING!

I think the larger hole has something to do with more airflow or something. I'm not sure why GM made them different.

Patsfan34 · 09-19-2010, 07:46 PM

But my question is do I just break up my A/C and heat setup to just use the heater box or is it better for me to just use a non A/C heater box and sell my A/C and heat set up complete. I'm not concerned about the firewall just want to know if I'm wasting money buying a non A/C heater box setup instead of just using what I currently have.

Sammy · 09-19-2010, 10:33 PM

Why not use a A/C delete plate and all your internal cab stuff and sell your A/C under hood box? Then you won't need a non a/c under hood box. No mods to the firewall this way which you will need to put the non-ac box in.

Patsfan34 · 09-21-2010, 09:28 PM

Sammy just so I'm clear. I can use my current heater box and slap an A/C delete plate on the firewall and just unmount the A/C stuff under the hood and all will still function correctly? So in short I would be wasting my money buying another non A/C heat setup. Right? Ok thanks!

Sammy · 09-21-2010, 11:05 PM

Of course your A/C stuff wouldn't work because you have that all disconnected. But yes everything else would be stock looking like with A/c in the cab. I've done this in my 71 GMC. Makes a real clean engine compartment this way. I can get you a pic of mine if you would like to see what it looks like.

Patsfan34 · 09-21-2010, 11:11 PM

Sammy thanks for info and yes pics would be appreciated. And I definitely understood before I ever even posted this thread that my A/C would not work. LOL Neil

Sammy · 09-21-2010, 11:12 PM

Here is a old pic I had on the puter.

09-19-2010, 08:51 AM	#1
Patsfan34 Registered User Join Date: Dec 2008 Location: New England Posts: 661	Using my A/C cab with non A/C heater box? My 70 truck came with the A/C setup but I don't want to use that stuff. I haven't pulled the system out of the cab or off the firewall yet. There's a member selling a nice non A/C heater box that's about an hour from me for a good price so I'm just trying to get some answers so I don't hold him up. Assuming the non A/C heater box will bolt right in, is there any reason I shouldn't buy his setup and put it in my truck and then sell my A/C heater box set up complete? Or am I wasting my money and I could just take the stuff I need from my A/C setup now and break it up and use the heater box and blower and sell just the A/C portion of my set up? I hope that made sense! Thanks, Neil

09-19-2010, 03:53 PM	#2
c1069 Registered User Join Date: Apr 2010 Location: McFarland CA Posts: 1,392	Re: Using my A/C cab with non A/C heater box? this it what i find IMO need modification, Attached Images Last edited by c1069; 09-19-2010 at 07:59 PM.

09-19-2010, 04:44 PM	#3
Dark Knight Registered User Join Date: Dec 2008 Location: Pleak, Texas Posts: 420	Re: Using my A/C cab with non A/C heater box? You don't have to modify the firewall. I put factory A/C in my non-A/C truck with no modifications. Everything works fine. The cold is cold and the hot is...well...ROASTING! I think the larger hole has something to do with more airflow or something. I'm not sure why GM made them different. __________________ -1967 Chevrolet Fleetside LWB- 350 V8 w/thumpr cam, NV3500, 3.08 gears, A/C, PS -1983 Chevy Silverado C1500- 383 stroker, TH400 -1989 Chevy Silverado K1500 SWB- 5.3L swap, 700R4, 3.42 gears -And a '66 Ford Mustang- 200 I6, C4 trans, rust bucket "The only thing we have to fear is fear itself." -FDR (and maybe rust too) You've gotta be able to stop and steer before you can go fast! Last edited by Dark Knight; 09-19-2010 at 04:44 PM.

09-19-2010, 07:46 PM	#4
Patsfan34 Registered User Join Date: Dec 2008 Location: New England Posts: 661	Re: Using my A/C cab with non A/C heater box? But my question is do I just break up my A/C and heat setup to just use the heater box or is it better for me to just use a non A/C heater box and sell my A/C and heat set up complete. I'm not concerned about the firewall just want to know if I'm wasting money buying a non A/C heater box setup instead of just using what I currently have.

09-19-2010, 10:33 PM	#5
Sammy Registered User Join Date: Apr 2000 Location: Bonne Terre, Mo Posts: 3,005	Re: Using my A/C cab with non A/C heater box? Why not use a A/C delete plate and all your internal cab stuff and sell your A/C under hood box? Then you won't need a non a/c under hood box. No mods to the firewall this way which you will need to put the non-ac box in. __________________ '69 Chevy Long Fleet & '71 GMC Short Step & Project "ODD BALL" "You can wash a pig, soak it in most expensive perfume. In the end it is still just a pig." ODD BALL build thread http://67-72chevytrucks.com/vboard/s...d.php?t=478629"

09-21-2010, 09:28 PM	#6
Patsfan34 Registered User Join Date: Dec 2008 Location: New England Posts: 661	Re: Using my A/C cab with non A/C heater box? Sammy just so I'm clear. I can use my current heater box and slap an A/C delete plate on the firewall and just unmount the A/C stuff under the hood and all will still function correctly? So in short I would be wasting my money buying another non A/C heat setup. Right? Ok thanks!

09-21-2010, 11:05 PM	#7
Sammy Registered User Join Date: Apr 2000 Location: Bonne Terre, Mo Posts: 3,005	Re: Using my A/C cab with non A/C heater box? Of course your A/C stuff wouldn't work because you have that all disconnected. But yes everything else would be stock looking like with A/c in the cab. I've done this in my 71 GMC. Makes a real clean engine compartment this way. I can get you a pic of mine if you would like to see what it looks like. __________________ '69 Chevy Long Fleet & '71 GMC Short Step & Project "ODD BALL" "You can wash a pig, soak it in most expensive perfume. In the end it is still just a pig." ODD BALL build thread http://67-72chevytrucks.com/vboard/s...d.php?t=478629"

09-21-2010, 11:11 PM	#8
Patsfan34 Registered User Join Date: Dec 2008 Location: New England Posts: 661	Re: Using my A/C cab with non A/C heater box? Sammy thanks for info and yes pics would be appreciated. And I definitely understood before I ever even posted this thread that my A/C would not work. LOL Neil

09-21-2010, 11:12 PM	#9
Sammy Registered User Join Date: Apr 2000 Location: Bonne Terre, Mo Posts: 3,005	Re: Using my A/C cab with non A/C heater box? Here is a old pic I had on the puter. Attached Images __________________ '69 Chevy Long Fleet & '71 GMC Short Step & Project "ODD BALL" "You can wash a pig, soak it in most expensive perfume. In the end it is still just a pig." ODD BALL build thread http://67-72chevytrucks.com/vboard/s...d.php?t=478629"



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