Acc carpet install question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Hidesertchevy · 02-27-2026, 03:21 PM

Hello fellas, I’m attempting to install new carpet in my 1970 Chevy truck. Does the carpet go under the firewall insulation pad or over the top of it . curious if it tucks behind it or not thank you.

LS short box · 02-27-2026, 05:20 PM

IIRC it goes over the firewall insulation.

**71CHEVYSHORTBED402** · 02-28-2026, 12:25 AM

I'll look and respond tomorrow if you haven't heard for sure yet.

Hidesertchevy · 03-01-2026, 04:32 PM

can anyone confirm if the carpet goes on top of the fire wall pad?

Hidesertchevy · 03-01-2026, 04:32 PM

Quote:

Originally Posted by 71CHEVYSHORTBED402

I'll look and respond tomorrow if you haven't heard for sure yet.

Ok that would be great! Thank you.

**sfont66** · 03-01-2026, 08:54 PM

All mine (3 different sets)have been cut to fit over the firewall insulation
Here’s a few pics.

**71CHEVYSHORTBED402** · 03-02-2026, 11:47 AM

A seasoned pro installed my carpet. It's what I thought it was, 50/50 chance☺ - the carpet installs on top. Otherwise I'd think it would jack up the pads and plugs mounting it.

Hidesertchevy · 03-02-2026, 12:56 PM

Thank you guys for the clarification!

68 C10 Driver · 03-06-2026, 02:43 PM

I opted to use Lizard Skin inside the cab to deaden the sound and have a thermal barrier. I do not know how effective this will be, but I have heard great things about the product and seen a couple of builds online where it significantly reduced heat. As a result, I did not run the cardboard and insulation along the firewall. Given all that, here is what the carpet in my cab looks like along the firewall.

Hidesertchevy · 03-06-2026, 05:07 PM

Quote:

Originally Posted by 68 C10 Driver

I opted to use Lizard Skin inside the cab to deaden the sound and have a thermal barrier. I do not know how effective this will be, but I have heard great things about the product and seen a couple of build online where it significantly reduced heat. As a result, I did not run the cardboard and insulation along the firewall. Given all that, here is what the carpet in my cab looks like along the firewall.

Looks very nice. Thanks for the pics!

**WorldsCrappiestTruck** · 03-06-2026, 07:58 PM

That’s tidy right there. Nice stuff.

My ACC vinyl floor was complete garbage. I’ll give their carpet a try. Fool me once, shame on you. Fool me twice….

68 C10 Driver · 03-07-2026, 04:01 PM

Quote:

Originally Posted by WorldsCrappiestTruck

That’s tidy right there. Nice stuff.

My ACC vinyl floor was complete garbage. I’ll give their carpet a try. Fool me once, shame on you. Fool me twice….

My carpet is from ACC, I am very pleased with it, great fit...excellent quality.

LS short box · 03-07-2026, 10:16 PM

So on my hot rod projects insulation wise I use the following:
Completely cover the bare cab Dyna Mat like stuff from Summit. I buy the universal kit and cut to fit from the top of the firewall to the back of the cab.
The Dyna Mat like insulation is self sticking.
After that I use I think from DEI foil insulation. Foil on both sides with about 3/8" jute between the foil. 3M glue it to the Dyna Mat like stuff.
Pic of my 68 prior to carpet.

02-27-2026, 03:21 PM	#1
Hidesertchevy Registered User Join Date: Mar 2017 Location: yucca valley Posts: 318	Acc carpet install question Hello fellas, I’m attempting to install new carpet in my 1970 Chevy truck. Does the carpet go under the firewall insulation pad or over the top of it . curious if it tucks behind it or not thank you. Last edited by Hidesertchevy; 02-27-2026 at 04:29 PM. Reason: Mistake

02-27-2026, 05:20 PM	#2
LS short box Registered User Join Date: Jun 2015 Location: Carlos MN Posts: 2,592	Re: Acc carpet install question IIRC it goes over the firewall insulation.

02-28-2026, 12:25 AM	#3
71CHEVYSHORTBED402 Senior Member Join Date: Feb 2009 Location: Northern Nevada Posts: 7,689	Re: Acc carpet install question I'll look and respond tomorrow if you haven't heard for sure yet. __________________ Tony 1971 C10 Custom Deluxe SWB 402/400TH A/C I developed an assembly information kit for restoring my truck from nuts and bolts. It's written in Assy. order, short & simple, packed with all OEM hardware ID; castings; part ID; 100s of part numbers; wiring simple - Resource, and trivial too. Much info. applies to all 67-72 GM, A/C vehicles, esp. trucks W/O saying. Full search ability, including to 700+ images of illus., parts, charts, Assy., points of interest, cab, bed, & front clip cart plans- Specials and cores were serviced out and R excluded e.g. front/rear glass, body/paint, engine core, rebuilt hinges, steering box, trans, etc. The project was in-line with long former professions developing process, policy, specs, demo, written for novices, admin., policy, engineers, development, systems & test - Public & govt 2, gross. Sell soft copy cheaply, PM if interested.Build thread:https://67-72chevytrucks.com/vboard/...d.php?t=730025

03-01-2026, 04:32 PM	#4
Hidesertchevy Registered User Join Date: Mar 2017 Location: yucca valley Posts: 318	Re: Acc carpet install question can anyone confirm if the carpet goes on top of the fire wall pad?

03-01-2026, 08:54 PM	#6
sfont66 Senior Member Join Date: Nov 2015 Location: Pine City MN Posts: 431	Re: Acc carpet install question All mine (3 different sets)have been cut to fit over the firewall insulation Here’s a few pics. Attached Images __________________ 72 C10, Was a 350,M20, Brodix heads,Comp cam, Edelbrock intake&carb, Hedman hedders LWB. Project is now a 5.3(L33) w/PRC stage 2.5 CNC ported 243heads, FAST 102/102, FIC injectors,BTR RedHot cam,Holley Terminator X, T56 magnum. SWB, Boyd tank. 4.5/4 Drop http://67-72chevytrucks.com/vboard/s...My72c10project

03-02-2026, 11:47 AM	#7
71CHEVYSHORTBED402 Senior Member Join Date: Feb 2009 Location: Northern Nevada Posts: 7,689	Re: Acc carpet install question A seasoned pro installed my carpet. It's what I thought it was, 50/50 chance☺ - the carpet installs on top. Otherwise I'd think it would jack up the pads and plugs mounting it. Attached Images __________________ Tony 1971 C10 Custom Deluxe SWB 402/400TH A/C I developed an assembly information kit for restoring my truck from nuts and bolts. It's written in Assy. order, short & simple, packed with all OEM hardware ID; castings; part ID; 100s of part numbers; wiring simple - Resource, and trivial too. Much info. applies to all 67-72 GM, A/C vehicles, esp. trucks W/O saying. Full search ability, including to 700+ images of illus., parts, charts, Assy., points of interest, cab, bed, & front clip cart plans- Specials and cores were serviced out and R excluded e.g. front/rear glass, body/paint, engine core, rebuilt hinges, steering box, trans, etc. The project was in-line with long former professions developing process, policy, specs, demo, written for novices, admin., policy, engineers, development, systems & test - Public & govt 2, gross. Sell soft copy cheaply, PM if interested.Build thread:https://67-72chevytrucks.com/vboard/...d.php?t=730025

03-02-2026, 12:56 PM	#8
Hidesertchevy Registered User Join Date: Mar 2017 Location: yucca valley Posts: 318	Re: Acc carpet install question Thank you guys for the clarification!

03-06-2026, 02:43 PM	#9
68 C10 Driver Registered User Join Date: Oct 2020 Location: Kathleen, GA Posts: 753	Re: Acc carpet install question I opted to use Lizard Skin inside the cab to deaden the sound and have a thermal barrier. I do not know how effective this will be, but I have heard great things about the product and seen a couple of builds online where it significantly reduced heat. As a result, I did not run the cardboard and insulation along the firewall. Given all that, here is what the carpet in my cab looks like along the firewall. Attached Images Last edited by 68 C10 Driver; 03-07-2026 at 04:02 PM.

03-06-2026, 07:58 PM	#11
WorldsCrappiestTruck Senior Member Join Date: Mar 2022 Location: Hinesburg Vermont Posts: 350	Re: Acc carpet install question That’s tidy right there. Nice stuff. My ACC vinyl floor was complete garbage. I’ll give their carpet a try. Fool me once, shame on you. Fool me twice….

03-07-2026, 10:16 PM	#13
LS short box Registered User Join Date: Jun 2015 Location: Carlos MN Posts: 2,592	Re: Acc carpet install question So on my hot rod projects insulation wise I use the following: Completely cover the bare cab Dyna Mat like stuff from Summit. I buy the universal kit and cut to fit from the top of the firewall to the back of the cab. The Dyna Mat like insulation is self sticking. After that I use I think from DEI foil insulation. Foil on both sides with about 3/8" jute between the foil. 3M glue it to the Dyna Mat like stuff. Pic of my 68 prior to carpet. Attached Images



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