Is this the correct AC Delete Cover??
Team Owner
Joined: Jun 2000
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From: Southbound
Cruise-In II Veteran
Since AC was optional at extra cost, there is nothing to delete. What you have looks like a standard heat/defrost box. FWIW: do you have the 77 asssembly instruction manaul (AIM)? It can help with what you getting ready to do.
Thread Starter
Pro
Joined: May 2015
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From: Milford, CT
Yea,,, that's what I want. My car has air. I am removing it and I want my car to look like it never had it. The only other question I have is can I use the same heater core? Mine is for an AC car and I don't know if there is a difference between the 2. I would prefer not to remove the heater core and any of the factory under dash parts. I just want to remove the stuff that's in the engine compartment.
Thread Starter
Pro
Joined: May 2015
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From: Milford, CT
Yes. I have the AIM and the service manual and a few restoration guides. None of them are very clear to me. What I want to do is remove all the AC components from the engine compartment and install the non-AC cover over my existing heater core. I am not sure if I need to replace my existing heater core with one from a NON-AC car. I can't figure out if there are 2 different ones. I do know that for the AC Delete aftermarket cover they state it will fit over the existing AC heater core with no modifications. It doesn't make sense to me that Chevy would have 2 different heater cores but.....
Drifting
Joined: Oct 2007
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From: Marina CA
The heater cores are different. The piping on each is a different configuration. To do it right you should change the inner components as well as the control unit, it's different also.
You may have to do some firewall work as the two outers were shaped completely different.
You may have to do some firewall work as the two outers were shaped completely different.
Race Director
Joined: Oct 2000
Posts: 12,683
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From: Shamong, NJ
Heater core, inner heater box, heater controls and the opening in the firewall, are all different on a heater only car. The air ducts and outside air vents are different too.My car has air. I am removing it and I want my car to look like it never had it. The only other question I have is can I use the same heater core? Mine is for an AC car and I don't know if there is a difference between the 2. I would prefer not to remove the heater core and any of the factory under dash parts. I just want to remove the stuff that's in the engine compartment.
There is no way to use the heat only outer box, with the AC heater core or inner heater box. I don't even think the no air outer box, will cover the AC box's hole in the firewall.
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Thread Starter
Pro
Joined: May 2015
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From: Milford, CT
Heater core, inner heater box, heater controls and the opening in the firewall, are all different on a heater only car. The air ducts and outside air vents are different too.The AC heater core inlet and outlet point straight down, while the ones for a heat only core, come out the left side of the box.
There is no way to use the heat only outer box, with the AC heater core or inner heater box. I don't even think the no air outer box, will cover the AC box's hole in the firewall.
Thanks for the info. I was getting my info from this old thread on this forum.. https://www.corvetteforum.com/forums...te-1977-a.html
On this thread the poster BKbroiler mentioned that he bought a cover from AC DELETE and he didn't have to change out his heater core or any of the stuff under the dash. The only thing he had to remove under the dash was 1 screw.
Race Director
Joined: Oct 2000
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From: Shamong, NJ
Thanks for the info. I was getting my info from this old thread on this forum.. https://www.corvetteforum.com/forums...te-1977-a.html
On this thread the poster BKbroiler mentioned that he bought a cover from AC DELETE and he didn't have to change out his heater core or any of the stuff under the dash. The only thing he had to remove under the dash was 1 screw.
On this thread the poster BKbroiler mentioned that he bought a cover from AC DELETE and he didn't have to change out his heater core or any of the stuff under the dash. The only thing he had to remove under the dash was 1 screw.
The piece that BKbroiler used is not a stock GM heater box, but an aftermarket piece from a company called AC Delete. From looking at the picture, the heater box they make is designed to cover the stock larger air conditioning hole in the firewall, and use the AC heater core. I don't know anything about this company, and I couldn't get their website to open?
Thread Starter
Pro
Joined: May 2015
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From: Milford, CT
If you look at post number 5 in the link you posted, you can see what has to be done to use a stock 77 no air outer heater box.Once those mods are made to the firewall, you have to use the stock no air inner box.
The piece that BKbroiler used is not a stock GM heater box, but an aftermarket piece from a company called AC Delete. From looking at the picture, the heater box they make is designed to cover the stock larger air conditioning hole in the firewall, and use the AC heater core. I don't know anything about this company, and I couldn't get their website to open?
The piece that BKbroiler used is not a stock GM heater box, but an aftermarket piece from a company called AC Delete. From looking at the picture, the heater box they make is designed to cover the stock larger air conditioning hole in the firewall, and use the AC heater core. I don't know anything about this company, and I couldn't get their website to open?
I also found this one at Ecklers. Actually.. several Corvette companies make them... http://www.ecklerscorvette.com/corve...1968-1982.html
I absolutely don't want to remove all the stuff under the dash and I would prefer to keep my heater core even though I am disconnecting the lines to it. I guess my only option is one of these aftermarket covers. I just assumed that a factory non-AC cover would work even if I had to cut some holes in the bottom of it for my heater core inlet and outlet. I guess it won't. Funny thing is if you compare the stock non-AC cover with the aftermarket cover they look very similar.
Thread Starter
Pro
Joined: May 2015
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From: Milford, CT
If you look at post number 5 in the link you posted, you can see what has to be done to use a stock 77 no air outer heater box.Once those mods are made to the firewall, you have to use the stock no air inner box.
The piece that BKbroiler used is not a stock GM heater box, but an aftermarket piece from a company called AC Delete. From looking at the picture, the heater box they make is designed to cover the stock larger air conditioning hole in the firewall, and use the AC heater core. I don't know anything about this company, and I couldn't get their website to open?
The piece that BKbroiler used is not a stock GM heater box, but an aftermarket piece from a company called AC Delete. From looking at the picture, the heater box they make is designed to cover the stock larger air conditioning hole in the firewall, and use the AC heater core. I don't know anything about this company, and I couldn't get their website to open?
Also, when looking at post number 5 I don't understand why he would glass the opening. If you look at the picture of a factory Non-AC cover.. it appears it would fit the opening he already had before he glassed it. I suppose the heater core inlet and outlet would be in the wrong place but that's just a matter of cutting the cover... not glassing the firewall. It just doesn't make sense to me.
Burning Brakes
Joined: Aug 2008
Posts: 878
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From: Deep South Denmark
Also, when looking at post number 5 I don't understand why he would glass the opening. If you look at the picture of a factory Non-AC cover.. it appears it would fit the opening he already had before he glassed it. I suppose the heater core inlet and outlet would be in the wrong place but that's just a matter of cutting the cover... not glassing the firewall. It just doesn't make sense to me.
Le Mans Master
Joined: Dec 2003
Posts: 5,381
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From: N J
Also, when looking at post number 5 I don't understand why he would glass the opening. If you look at the picture of a factory Non-AC cover.. it appears it would fit the opening he already had before he glassed it. I suppose the heater core inlet and outlet would be in the wrong place but that's just a matter of cutting the cover... not glassing the firewall. It just doesn't make sense to me.
Also, with that older box the non air heater duct behind the radio wont fit.
Had to make a new one and duct it back more.
Team Owner
Joined: Jun 2000
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From: Southbound
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Thread Starter
Pro
Joined: May 2015
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From: Milford, CT
According to Ecklers.. the one they sell is good from 68-82. I just remove my AC components, I can re-use my existing AC heater core and simply mount the blower motor to the new case and bolt it to the firewall. Done. There are a few companies on Ebay to that sell the same one. The aftermarket cover for 68-82 is not the same size as a stock non-AC cover. Its designed specifically for converting an AC car to a NON AC car while still retaining the stock heater core and with no modifications to the firewall. That's what I need. Pricey but it is what it is...
Last edited by jgcable; Jul 23, 2015 at 08:19 AM.