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deleting the ac/heater

Old Sep 6, 2025 | 08:44 PM
  #1  
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deleting the ac/heater

Hi! so I've gotten pretty far on removing my ac/heat on the engine side so far but I'm, in the conclusion that i may have to fabricate a whole plate, which im prepared for ha. but wanted to show for those curious minds. since evey ac/heat box ive seen or even plate is significantly different. also going to be making a vacuum booster for my motor that'll possibly sit next to the heater core.

any advice is appreciated. or strong criticism.

*also hopefully i put this post in the right area*

this is inside the corner of the fender, attempting on making a template for this one as well.
this is inside the corner of the fender, attempting on making a template for this one as well.
i have traced out a templet with this so far, ordered gaskets for it. going to bolt the plate on.
i have traced out a templet with this so far, ordered gaskets for it. going to bolt the plate on.
the first part. now i dont have to fight these hoses anymore
the first part. now i dont have to fight these hoses anymore
got this off today. still have all these ac pieces. ill put them away incase i need em for vintage heating stuff.
got this off today. still have all these ac pieces. ill put them away incase i need em for vintage heating stuff.
Old Sep 7, 2025 | 04:12 AM
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Damn, covering the AC hole on a 70 is easy compared to that!


Old Sep 7, 2025 | 08:31 AM
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Originally Posted by Rallye469
Damn, covering the AC hole on a 70 is easy compared to that!

this 66 i havent seen much of the ac stuff or style. yours is way easier ha
Old Sep 7, 2025 | 08:57 AM
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Good work so far. As you found out, the air plenum between AC and nonAC cars is different. The alternator is also located on the opposite side of the engine.
Old Sep 7, 2025 | 03:43 PM
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Originally Posted by Olds64
Good work so far. As you found out, the air plenum between AC and nonAC cars is different. The alternator is also located on the opposite side of the engine.
i have a non olds motor unfortunately so my alt is on the pass side.
Old Sep 9, 2025 | 05:38 AM
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Originally Posted by Packie504
i have a non olds motor unfortunately so my alt is on the pass side.
Don't say that too loudly around here. lol
Old Sep 9, 2025 | 06:17 AM
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*because racecar LOL
Old Sep 10, 2025 | 04:31 PM
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Several places make the proper cover for that

Old Sep 10, 2025 | 08:50 PM
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the 66' f85 isnt a gbody though, ive looked bmr makes similar. should be here friday, but in process of making it aswell. already have the inner fender one mocked up an cut, just need to apply the gasket an make it somewhat presentable.
Old Sep 11, 2025 | 04:31 AM
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Make sure you post after pics.
Old Sep 12, 2025 | 10:58 PM
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alrighty, well mid way thru, project changed, ha.
I acquired the BMR plate today and it seems they didn't account for heater hoses. " also didn't check the product info either" anyways was going to cut a triangle out *blue line* but wanted to spruce it up with just cutting some holes for the hoses instead. well prior to that removing the bottom hose broke the line to the core unfortunately, so using the full plate. still have more to go. not secured to the firewall yet. removed the hvac from under dash, might be on the look out for a ac control blank plate if that exists. but more tomorrow. ill take more photos an show yall.




was going to try an make holes for the heater core lines, to make it more presentable, instead of just cutting the blue line out. but core busted.
was going to try an make holes for the heater core lines, to make it more presentable, instead of just cutting the blue line out. but core busted.
bmr plate. im going to use now, since heater core broke.
bmr plate. im going to use now, since heater core broke.
main plate i made, not super pretty or perfect but i was gonna do. until my heater outlet line broke. so removed the inside hvac.
main plate i made, not super pretty or perfect but i was gonna do. until my heater outlet line broke. so removed the inside hvac.
final piece. rtv black silicone an a cork gasket behind it too. sealed up. time will tell.
final piece. rtv black silicone an a cork gasket behind it too. sealed up. time will tell.
final piece of this corner cover.
final piece of this corner cover.
the two sides bolts i had underneath an smacked them with a hammer to
the two sides bolts i had underneath an smacked them with a hammer to "mark" there spot so i can drill out. test fitting in this picture
first bit, only had 4 bolts to secure, changed that to 6 lol. since i couldnt get anymore.
first bit, only had 4 bolts to secure, changed that to 6 lol. since i couldnt get anymore.
Old Sep 13, 2025 | 05:06 AM
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Are you going to have the heater core repaired and use it for vent/defrost? I think even non AC cars had a heater core and plenum so they could run defrost. There isn't an OE delete plate that will get rid of the controls entirely.
Old Sep 13, 2025 | 05:57 AM
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Originally Posted by Olds64
Are you going to have the heater core repaired and use it for vent/defrost? I think even non AC cars had a heater core and plenum so they could run defrost. There isn't an OE delete plate that will get rid of the controls entirely.
my plan in the future was to do vintage air heat only. but ac too still lays on the board. when i got the car, it had the duct work in the trunk but was shattered.so i only have defrost ducting, and maybe 6 inchs of the dryer hose looking stuff in the front corners, so i would have to re run or make a whole duct work for it again. i pulled everything out with out breaking anything. so if need be. the core would be the only thing that need replacing. the only thing that wasn't saved was the push pull cables for the hvac controls, i just cut those at the head.
i also figured there wasnt a plate for the controls, i could of sworn i seen someone offer plates that made gauges in that spot ha.
Old Sep 13, 2025 | 06:32 AM
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Packie, I put Vintage air in my 65. this is how I patched my firewall. Regards, Robert.

Old Sep 13, 2025 | 11:04 AM
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Originally Posted by 65 F85 Cutlass
Packie, I put Vintage air in my 65. this is how I patched my firewall. Regards, Robert.
I wish to be as nice as that. This is all a learning curve for me. Usually i just leave the lines but since the pipe broke. There was no turning back ha. Considering I had material an what not for deleting then fixing. But I must say. Engine bay cleans up nicely.
Old Sep 13, 2025 | 01:32 PM
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Without the fan or outside plenum, the heater is going to be basically useless. There will be no airflow across the heater core.
Old Sep 13, 2025 | 04:09 PM
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Originally Posted by matt69olds
Without the fan or outside plenum, the heater is going to be basically useless. There will be no airflow across the heater core.
yeah well that's all gone now. Finishing up today. Hopefully get the fender on
Old Sep 14, 2025 | 10:11 AM
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alrighty. its pretty much done now. i was going to save the lines but that went south with the bottom line breaking a leaking everywhere..*good thing i plan to change the carpet an what not* but everything is plated bolted an sealed. i have a few holes i have to "seal" where the weird plastic dowls were at, but thats besides the point. putting the fender back on was just as bad as taking it off. i left what ever ducting inside for future use. an will hold onto the ac components, or give em to someone in need. but until then heres photos

changed out the kick panels to the planes, since the speakers didn't work. then realized they are both for ac's lol
changed out the kick panels to the planes, since the speakers didn't work. then realized they are both for ac's lol
dont mined some of the goop. that was the previous person. they put that stuff all over.
dont mined some of the goop. that was the previous person. they put that stuff all over.
re sealed the corner of this plate. an went with the bmr plate.
re sealed the corner of this plate. an went with the bmr plate.
all buttoned up.
all buttoned up.
the inside corner cover
the inside corner cover
this one was fun to make an also difficult ha
this one was fun to make an also difficult ha
Old Sep 14, 2025 | 04:59 PM
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There isn't an OE delete plate that will get rid of the controls entirely.
Oh yes there was.
A lot of exports heading for South & Central America were heater delete.




​​​​​​​
Old Sep 15, 2025 | 06:04 AM
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AC delete and heater delete (C48) firewall covers were not listed in the parts book but were used on the assembly line. The C48 heater delete dash cover was available through the parts dept.



Old Sep 15, 2025 | 07:26 AM
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Rund...why would they have an AC delete plate?
(instead of just getting a non AC car?)

I understand the heat delete.
Old Sep 16, 2025 | 05:59 AM
  #22  
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Fisher Body used two floor pan/firewalls, AC and non-AC. There were two possibilities--a shortage of non-AC parts on the line, or almost all of the bodies in a given time period were for AC cars, so it was more convenient to build the bodies with an AC floor/firewall, and use delete plates for the few cars that would not get AC. The latter was found mostly on some Buick A-bodies.
Old Sep 16, 2025 | 07:31 AM
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That's interesting.
Never thought about the runs of the two stampings.
Old Sep 16, 2025 | 08:51 AM
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Interesting on the conversion plate. That would not fly these days.
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