Went the G20 A/C Delete Box Route....
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Joined: Jul 2003
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From: NYC / Jersey
Car: 1990 Trans Am GTA
Engine: Turbo 305 w/MS2
Transmission: 700R4
Went the G20 A/C Delete Box Route....
.... and I couldn't be happier. Needed a little strip of sheetmetal added to the far right side, about an inch in width, and could either be spot welded, or pop riveted into place (from behind). Installing it today, once the weather clears up. Thanks again Paul for the welding! 

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From: Utah
Car: 89 RS 89 iroc 87 firebird
Engine: 3.1 Turbo/ 355 twin turbo
Transmission: a4 w/ 4500 stall/ a4 / t5
Axle/Gears: strange s60 /w 3:42's
Re: Went the G20 A/C Delete Box Route....
btw guys u can pull these out of gmc 2500 vans
this is actually were this box came from and it leaves even more room then a factory non ac box
this is actually were this box came from and it leaves even more room then a factory non ac box
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From: Tescott, Kansas 67484
Car: 1987 Camaro
Engine: 350 dart ies comp cam intake carb
Transmission: 700 r4, shift kit, 2400 stall
Axle/Gears: 10 bolt stock
Re: Went the G20 A/C Delete Box Route....
post up a pic when you get it all on...
Thread Starter
Joined: Jul 2003
Posts: 10,525
Likes: 204
From: NYC / Jersey
Car: 1990 Trans Am GTA
Engine: Turbo 305 w/MS2
Transmission: 700R4
Re: Went the G20 A/C Delete Box Route....
^ Just mounted the box for now, along with the resistor up on top of it. Although I glued the sides of the box with sealant, and bolted it all down, for the hell of it, I'm going to seal it some more through the opening, as I couldn't get a bolt down on the lower left hand side. But anyways, here's a pic w/out the wiring and blower. Forgive the glare of the sunlight....;
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From: Tescott, Kansas 67484
Car: 1987 Camaro
Engine: 350 dart ies comp cam intake carb
Transmission: 700 r4, shift kit, 2400 stall
Axle/Gears: 10 bolt stock
Re: Went the G20 A/C Delete Box Route....
was the sheet metal added to the box, or onto the firewall?
Thread Starter
Joined: Jul 2003
Posts: 10,525
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From: NYC / Jersey
Car: 1990 Trans Am GTA
Engine: Turbo 305 w/MS2
Transmission: 700R4
Re: Went the G20 A/C Delete Box Route....
^ This piece right here in the red, it was welded to the box before-hand then painted with the box.... 

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From: Tescott, Kansas 67484
Car: 1987 Camaro
Engine: 350 dart ies comp cam intake carb
Transmission: 700 r4, shift kit, 2400 stall
Axle/Gears: 10 bolt stock
Re: Went the G20 A/C Delete Box Route....
thanks ill probably go this route over the 70 dollar camaro one, does the wiring just plug right back in?
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Thread Starter
Joined: Jul 2003
Posts: 10,525
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From: NYC / Jersey
Car: 1990 Trans Am GTA
Engine: Turbo 305 w/MS2
Transmission: 700R4
Re: Went the G20 A/C Delete Box Route....
Originally Posted by mbolte
.... does the wiring just plug right back in?
I'll post pics of the wiring schematic when I get the chance, and yes, I get all four speeds of the blower motor. This was verified by unplugging the blower motor's vent hole, and watching the internal speed of the unit as the settings went from one through four, increased speed each and every time....
Thread Starter
Joined: Jul 2003
Posts: 10,525
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From: NYC / Jersey
Car: 1990 Trans Am GTA
Engine: Turbo 305 w/MS2
Transmission: 700R4
Re: Went the G20 A/C Delete Box Route....
Here is a picture of the modified (shortened) harness. I cut it because I'm a neat freak, and I wanted to reduce clutter. The relay will be mounted onto the firewall, with the two left wires leading to the blower motor, the four right wires leading to the resistor connector, then the HVAC head unit, and the two lower wires leading to a constant power and ground. I will post more pictures of the actual hookup sometime tomorrow.... 

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Joined: Jul 2003
Posts: 10,525
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From: NYC / Jersey
Car: 1990 Trans Am GTA
Engine: Turbo 305 w/MS2
Transmission: 700R4
Re: Went the G20 A/C Delete Box Route....
Sorry, was very busy, here's the final result, forgive the blurry pic.... 

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From: Newburgh, NY
Car: 1988 Iroc-Z
Engine: 5.7l 350 TPI
Transmission: 700R4 Auto
Axle/Gears: 3.43 posi
Re: Went the G20 A/C Delete Box Route....
This may sound dumb, forgive me greatly if it is, but can I not just remove the whole blower and all wiring to it if my A/C already isn't hooked up? I don't need heat or defroster either since this is my March-Nov car (not if it's rainy snowy or too cold) and i'm wondering if the first mounted picture you posted is fine to leave?
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From: Corner Brook, NL
Car: 1984 Z28 HT,2006 2500HD
Engine: 5.7L, 6.6Llbz dmax
Transmission: 700R4, 6 speed allison
Axle/Gears: worn out 3.73 posi
Re: Went the G20 A/C Delete Box Route....
This may sound dumb, forgive me greatly if it is, but can I not just remove the whole blower and all wiring to it if my A/C already isn't hooked up? I don't need heat or defroster either since this is my March-Nov car (not if it's rainy snowy or too cold) and i'm wondering if the first mounted picture you posted is fine to leave?
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Joined: Mar 2007
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From: Newburgh, NY
Car: 1988 Iroc-Z
Engine: 5.7l 350 TPI
Transmission: 700R4 Auto
Axle/Gears: 3.43 posi
Re: Went the G20 A/C Delete Box Route....
Oh ok, then say I have a chrome piece cut, I don't even need a delete box, just remove everything and that's that? How do you remove the whole unit? From the interior as well?
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From: Corner Brook, NL
Car: 1984 Z28 HT,2006 2500HD
Engine: 5.7L, 6.6Llbz dmax
Transmission: 700R4, 6 speed allison
Axle/Gears: worn out 3.73 posi
Re: Went the G20 A/C Delete Box Route....
there are some screws up top and some down bottom the ones on top you get from the engine bay and the ones on the bottom are inside the car i think they were right by the edge of the carpet if my memory is working good and im pretty sure you can buy the delete plates already chromed and prettied up, dunno where tho
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From: Western WA
Car: 85 Camaro
Engine: No
Transmission: No
Axle/Gears: No
Re: Went the G20 A/C Delete Box Route....
There are three screws and a stud under the hood on the unit, and there are three screws on the interior near the passengers feet. That will get rid of everything on the exterior of the firewall.
Joined: Dec 2007
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From: Minnesota
Car: 84 camaro, 88 trans am, 98 camaro
Engine: Modded , stock, LSX modded
Transmission: 700r4, 700r4, t-56
Axle/Gears: 327, 308, 373
Re: Went the G20 A/C Delete Box Route....




----------
that G20 box was a great idea too
Last edited by FueledSoul; Nov 12, 2008 at 08:36 PM. Reason: Automerged Doublepost
Thread Starter
Joined: Jul 2003
Posts: 10,525
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From: NYC / Jersey
Car: 1990 Trans Am GTA
Engine: Turbo 305 w/MS2
Transmission: 700R4
Re: Went the G20 A/C Delete Box Route....
Sadler, I might have an extra box if you'd like, no charge.... 
... by the way, sorry for the late response!
FueledSoul, I'm loving that engine bay.....!

... by the way, sorry for the late response!

FueledSoul, I'm loving that engine bay.....!
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Car: 1985 z-28
Engine: 350ci
Transmission: 700-r4
Re: Went the G20 A/C Delete Box Route....
So you can use the stock AC motor and fan cage with no depth issues on this box?
Oh by the way that one engine bay pic looked awfully familiar.....
Oh by the way that one engine bay pic looked awfully familiar.....
Joined: Dec 2007
Posts: 1,924
Likes: 12
From: Minnesota
Car: 84 camaro, 88 trans am, 98 camaro
Engine: Modded , stock, LSX modded
Transmission: 700r4, 700r4, t-56
Axle/Gears: 327, 308, 373
Re: Went the G20 A/C Delete Box Route....
----------
Last edited by FueledSoul; Nov 12, 2008 at 10:03 PM. Reason: Automerged Doublepost
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From: Flowood,MS
Car: 87 IROC Z
Engine: 5.7 L98 TPI
Transmission: 700r4,2500 stall
Axle/Gears: G80,10 bolt 3.42's
Re: Went the G20 A/C Delete Box Route....
Please do post those wiring schematics.I installed the camaro a/c delete box and I`m having couple issues.I`m using the resistor from the delete box and it`s only got three connectors and I have five wires like you do on the right.I have the blower motor wires and all right I think I just dont know which three of the five wires i need to hook up.Did you make that hose and use groomets or something to connect it?I dont have it but need it or need to make one.
I`ve looked for trucks and vans with these heater boxes around here.Cant find them.What you find here is vans with front and rear air.I dont think I`ve ever seen a car without a/c that was made since atleast 75 or 80.
I`ve looked for trucks and vans with these heater boxes around here.Cant find them.What you find here is vans with front and rear air.I dont think I`ve ever seen a car without a/c that was made since atleast 75 or 80.
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From: Chattanooga TN
Car: 87 GTA
Engine: 350 Tune port
Transmission: 700r4,2500 stall
Re: Went the G20 A/C Delete Box Route....
.... and I couldn't be happier. Needed a little strip of sheetmetal added to the far right side, about an inch in width, and could either be spot welded, or pop riveted into place (from behind). Installing it today, once the weather clears up. Thanks again Paul for the welding! 



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Joined: Jul 2007
Posts: 1,305
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From: Corner Brook, NL
Car: 1984 Z28 HT,2006 2500HD
Engine: 5.7L, 6.6Llbz dmax
Transmission: 700R4, 6 speed allison
Axle/Gears: worn out 3.73 posi
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From: Northeast CT
Car: '89 IROC-Z
Engine: LSx
Transmission: T-56
Axle/Gears: 3.42
Re: Went the G20 A/C Delete Box Route....
[quote=tommy z-28;3947073]So you can use the stock AC motor and fan cage with no depth issues on this box?quote]
I couldnt use my motor or fan cage out of my IROC, the shaft that the fan cage is on was longer, and the fan cage itself was bigger, I switched the whole motor/fan cage from the G20, different plug but that was no problem. Hooked up just fine, still have all four speeds, its just a little louder.
I couldnt use my motor or fan cage out of my IROC, the shaft that the fan cage is on was longer, and the fan cage itself was bigger, I switched the whole motor/fan cage from the G20, different plug but that was no problem. Hooked up just fine, still have all four speeds, its just a little louder.
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From: Flowood,MS
Car: 87 IROC Z
Engine: 5.7 L98 TPI
Transmission: 700r4,2500 stall
Axle/Gears: G80,10 bolt 3.42's
Re: Went the G20 A/C Delete Box Route....
That answers one question.I bought a fan for a non a/c box and it still wouldn't fit.I guessed that may have been the problem but wasn't sure.I was going to buy the motor tomorrow to see if it was different.
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From: Northeast CT
Car: '89 IROC-Z
Engine: LSx
Transmission: T-56
Axle/Gears: 3.42
Re: Went the G20 A/C Delete Box Route....
Yeah I had to use the whole set-up, I tried the G20 fan blades on my original motor but it still wouldnt fit.
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From: Wilmington,NC
Car: 87 trans am
Engine: 305
Transmission: T5
Axle/Gears: 3.42 SLP rear
Re: Went the G20 A/C Delete Box Route....
What years of vans does this come from? I have a few vans just sitting, but I think they have AC...
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From: Flowood,MS
Car: 87 IROC Z
Engine: 5.7 L98 TPI
Transmission: 700r4,2500 stall
Axle/Gears: G80,10 bolt 3.42's
Re: Went the G20 A/C Delete Box Route....
Yup,that fixed it got it all working now.
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From: Ventura County, California
Car: 2002 GS300 Sport Design
Engine: 3.0L 2JZGE
Transmission: 5-Speed Shiftable Automatic
Re: Went the G20 A/C Delete Box Route....
Re: Went the G20 A/C Delete Box Route....
Hey! I did the exact same thing. I got rid of everything and patched up, and smoothed the whole firewall on the passenger side of the car. Quick question, if im looking correctly, did you do away with the wire harness hole? I was thinking about doing the same thing after recieving my new Painless harness a week ago however, im not sure were to run the new harness. Id like to run it in a way that will keep it hidden. I was actually thinking about running what needs to go to the passenger side of the car down the inside of the fiewall over to the sub-frame rail, into the sube frame rail, then run it out of the sub-frame rail closest to were it is needed. Same with the drivers side. Than you wouldnt see any wiring running from the firewall all the way up to the headlight harness until it came out of the sub-frame rail. Im just not sure if i really want to drill wholes in them. But its not like they would be big, just big enough for the wire to come through. My car is frame tied, but im still concerned about the over all structure. What do you guys think? Sorry just thinking out loud!
Last edited by Jeromey Cummins; Dec 5, 2009 at 08:43 PM.
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From: p'cola FL
Car: 88 iroc-z/28
Engine: 408 lsx
Transmission: 5800 stall
Axle/Gears: 4.71
Re: Went the G20 A/C Delete Box Route....
there will be structure loss anytime its modified. enough to cause any harm? no. drill away in my opinion.
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Joined: Dec 2009
Posts: 201
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From: sc
Car: 1987 camaro lt
Engine: soon 383
Transmission: 700r4
Re: Went the G20 A/C Delete Box Route....
ok this dont look to bad think we have one of them vans in the junk yard will look at it. only thing id like to know now is can i use the same blower that is on my camaro now with this box out of the van?
Last edited by vangogh4560; Dec 8, 2009 at 01:59 AM. Reason: cant typ
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From: p'cola FL
Car: 88 iroc-z/28
Engine: 408 lsx
Transmission: 5800 stall
Axle/Gears: 4.71
Re: Went the G20 A/C Delete Box Route....
how long have people been using these boxes to swap into 3rd gens?
i purchased a "a/c delete box" years ago with no picture.
when i got it, it was not as advertised. i had 3 real deal factory ones and this one was bogus.
i painted it and hung it in the shop so it wouldnt rust.
are they worth anything?
ive got one thats a dust collector.
maybe the guy i got it from thought it was right.
it does not have the extra lip welded on. its completely factory.
ill have to get a pic up.
i purchased a "a/c delete box" years ago with no picture.
when i got it, it was not as advertised. i had 3 real deal factory ones and this one was bogus.
i painted it and hung it in the shop so it wouldnt rust.
are they worth anything?
ive got one thats a dust collector.
maybe the guy i got it from thought it was right.
it does not have the extra lip welded on. its completely factory.
ill have to get a pic up.
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From: Ventura County, California
Car: 2002 GS300 Sport Design
Engine: 3.0L 2JZGE
Transmission: 5-Speed Shiftable Automatic
Re: Went the G20 A/C Delete Box Route....
Where can I get me one of these ac delete box.
Thanks. Tony.
Thanks. Tony.
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From: New Port Richey, Fl
Car: 1985 Trans Am
Engine: 6.6 at least
Transmission: T-56 (waiting)
Axle/Gears: 9" w/4.56 & spool (4 now)
Re: Went the G20 A/C Delete Box Route....
I found mine on ebay, payed $35 I think...I used the stock fan motor but I used the "squirrel cage" from a Fiero, it fits just fine.....
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