Firewall Holes - The 1947 - Present Chevrolet & GMC Truck Message Board Network

wsurf4me · 02-18-2013, 09:42 AM

So I've decided to fill in some of the holes in my swiss cheese firewall. The problem is I don't know which ones to leave. The previous owner had just the bare essentials, no heater or ac. I kind of hate to fill them all just to redrill later, is there any way to identify what to leave alone?

wsurf4me · 02-18-2013, 10:03 AM

Here's some pics of what I have -

solidaxel · 02-18-2013, 11:18 AM

I have always filled all except the steering column and started fresh

_Ogre · 02-18-2013, 12:48 PM

i'm with solidaxle, i welded everything closed and cut very few after.
i also shaved the standing seam that joins the firewall to both cowl panels
if your using the stock elements plan accordingly, ie; hood hinges, battery tray, heater, wire harness

OrrieG · 02-18-2013, 01:39 PM

I did the same as Orge except I kept the battery box and ground behind it and stock throttle opening in the recess. Wanted a clean slate to start with.

**Denee007** · 02-18-2013, 05:23 PM

I did the same as all of the above! Ogre made me do it! lol and then you have to remove the ridge too! ha! It was a pain, but worth the effort. Mine is not nearly as good, but it looks good for my level of expertise. After having a blank wall of no holes, I hated to drill anywhere on my firewall! dne'

wsurf4me · 02-18-2013, 07:39 PM

Thanks for all the replies, I went ahead and dove in. Here's this afternoons progress.

**Denee007** · 02-18-2013, 08:45 PM

Wow, you work fast!! ; )

booger1949 · 02-19-2013, 06:36 PM

feel them all in but the brake an clutch an the steering column by that way if u need to add a hole u can redrill in a nice hidden spot an your firewall looks so much better

solidaxel · 02-19-2013, 10:24 PM

Quote:

Originally Posted by booger1949

fill them all in but the brake an clutch an the steering column by that way if u need to add a hole u can redrill in a nice hidden spot an your firewall looks so much better

Yes, You will be much happier when you paint everything and hide the wires down low

dirtracer81_2 · 02-20-2013, 12:29 AM

Hey surf thanks for the pictures on the cab mounts. I have decided to go with ez chassis make life a little more simple hopefully. And glad i ran across this I was debating which holes myself the other night.
Posted via Mobile Device

wsurf4me · 02-20-2013, 09:51 PM

Quote:

Originally Posted by solidaxel

Yes, You will be much happier when you paint everything and hide the wires down low

My next move is to look at moving the harness down low, I have no idea why it's up high. I'm thinking that I can run most of it between the inner and outer fender walls, anyone have any insight on this?

wsurf4me · 02-20-2013, 09:52 PM

Quote:

Originally Posted by dirtracer81_2

Hey surf thanks for the pictures on the cab mounts. I have decided to go with ez chassis make life a little more simple hopefully. And glad i ran across this I was debating which holes myself the other night.
Posted via Mobile Device

No problem, hope it helped.

solidaxel · 02-20-2013, 09:56 PM

Quote:

Originally Posted by wsurf4me

My next move is to look at moving the harness down low, I have no idea why it's up high. I'm thinking that I can run most of it between the inner and outer fender walls, anyone have any insight on this?

That is exactly where I put mine!!

**Dan in Pasadena** · 02-21-2013, 12:17 AM

Hopefully I won't get flamed all to hell! lol.

Has anyone tried one of THESE firewall covers?

http://www.nolimitparts.com/prodinfo.asp?number=CFWC

It's a little pricey but for someone who dosn't know how to weld, maybe it's a consideration?

I knew a guy that made his own from sheet metal and it looks fine. Since you cover the interior with sound deadner and carpet (typically) wouldn't this work fine? Do you guys consider it Mickey Mouse?

_Ogre · 02-21-2013, 01:34 PM

Quote:

Originally Posted by wsurf4me

My next move is to look at moving the harness down low, I have no idea why it's up high. I'm thinking that I can run most of it between the inner and outer fender walls, anyone have any insight on this?

my rear harness exits next to my steering column right under my ezwire fuse panel.
my front harness is in the grey flex conduit next to my heater hoses.
my engine harness for the ramjet is huge and exits behind my distributor plus 2 wires you see

when i boxed my frame i stuck a straight piece of 1/2'' pvc in the frame that exits out the back for my rear harness
you can see a little white pvc sticking out behind my trans x-member

wsurf4me · 02-22-2013, 02:14 PM

Thanks Ogre! Just curious is there any reason you ran the front harness down the passenger side? I think I have a Painless harness and it was routed on the drivers side for both front and rear. I only have a few wires for the engine so it should be pretty straight forward.

wsurf4me · 04-13-2013, 08:59 PM

So everything is welded up and new holes have been cut for the steering column and master cylinder. I'm trying to get ideas on how to run the harness, I like what Ogre did but am wondering what others have done. If I run it low how do I keep it out of sight or protected inside the cab?

SCHRUMGMC · 04-14-2013, 01:40 AM

What is with all of the holes ?

Indian113 · 04-14-2013, 08:22 AM

Quote:

Originally Posted by SCHRUMGMC

What is with all of the holes ?

You'll find out if you ever get that GMC! They just drilled a hole any time, anywhere they needed it.

SCHRUMGMC · 04-14-2013, 09:44 AM

Quote:

Originally Posted by Indian113

You'll find out if you ever get that GMC! They just drilled a hole any time, anywhere they needed it.

Oh I figured that

Soon my friend, soon

**Dan in Pasadena** · 04-14-2013, 11:20 AM

solidaxel,

What did you use to fill your smaller holes? It looks like a nail sticking out?

mknittle · 04-14-2013, 11:53 AM

Quote:

Originally Posted by Indian113

You'll find out if you ever get that GMC! They just drilled a hole any time, anywhere they needed it.

And often with little thought.

SCHRUMGMC · 04-14-2013, 02:27 PM

Looks awesome now

Russell Ashley · 04-14-2013, 02:50 PM

Quote:

Originally Posted by Indian113

You'll find out if you ever get that GMC! They just drilled a hole any time, anywhere they needed it.

You are fortunate if they drilled them. The extra holes on my truck were made with a chisel.

02-18-2013, 09:42 AM	#1
wsurf4me Registered User Join Date: Aug 2012 Location: Parrish, FL Posts: 120	Firewall Holes So I've decided to fill in some of the holes in my swiss cheese firewall. The problem is I don't know which ones to leave. The previous owner had just the bare essentials, no heater or ac. I kind of hate to fill them all just to redrill later, is there any way to identify what to leave alone? __________________ 58 Fleetside 71 Cheyenne

02-18-2013, 10:03 AM	#2
wsurf4me Registered User Join Date: Aug 2012 Location: Parrish, FL Posts: 120	Re: Firewall Holes Here's some pics of what I have - Attached Images __________________ 58 Fleetside 71 Cheyenne

02-18-2013, 11:18 AM	#3
solidaxel Registered User Join Date: Dec 2002 Location: Cactus Patch So. Az Posts: 4,749	Re: Firewall Holes I have always filled all except the steering column and started fresh Attached Images __________________ 53 TuTone Extended Cab 350 4-Spd 3:08 (SOLD) 53 Chevy Moldy pearl green ZZ-4 4L60E 9" 3:25 55 GMC 1st Black Mll (ZZ4) ZZ6 TKO 600 5 sp 3:73 62 Solidaxle Corvette Roman Red (327 340hp 4spd 3:36) C4 & C5 suspension tube chassis LS 3 4L70E 65 Corvette Coupe 327 350hp 4spd 4:11 78 Black Silverado SWB (350/350) 5.3 & 4L60E 3:42 2000 S-Type 3.0 (wife cruiser) 2003 GMC SCSB 5.3 4L60E 3:42

02-18-2013, 12:48 PM	#4
_Ogre Registered User Join Date: Jan 2012 Location: Motown Posts: 7,677	Re: Firewall Holes i'm with solidaxle, i welded everything closed and cut very few after. i also shaved the standing seam that joins the firewall to both cowl panels if your using the stock elements plan accordingly, ie; hood hinges, battery tray, heater, wire harness __________________ cool, an ogre smiley Ogre's 58 Truk build how to put your truck year and build thread into your signature shop air compressor timer

02-18-2013, 01:39 PM	#5
OrrieG Registered User Join Date: Jun 2006 Location: Idaho Posts: 8,800	Re: Firewall Holes I did the same as Orge except I kept the battery box and ground behind it and stock throttle opening in the recess. Wanted a clean slate to start with. __________________ 1959 Chevy Short Fleetside w/ 74 4WD drive train (current project) OrrieG Build Thread 1964 Chevelle Malibu w/ 355-350TH (daily driver) Helpful AD and TF Manual Site Old Car Manual Project

02-18-2013, 05:23 PM	#6
Denee007 Senior Member Join Date: May 2011 Location: Cypress, Tx. Posts: 1,504	Re: Firewall Holes I did the same as all of the above! Ogre made me do it! lol and then you have to remove the ridge too! ha! It was a pain, but worth the effort. Mine is not nearly as good, but it looks good for my level of expertise. After having a blank wall of no holes, I hated to drill anywhere on my firewall! dne' __________________ '72 Ford Bronco project(July 17 2021-?) https://67-72chevytrucks.com/vboard/...d.php?t=828015 59 Apache (sold 6-25-2021) 67 Ford Mustang (re-restored after Harvey) 1968 Jeep Cj5 (2-8-2020 to present) 1992 Jeep Yj (8-17-20 to present) (Jurassic build) www.Classiccarsandtools.com

02-18-2013, 07:39 PM	#7
wsurf4me Registered User Join Date: Aug 2012 Location: Parrish, FL Posts: 120	Re: Firewall Holes Thanks for all the replies, I went ahead and dove in. Here's this afternoons progress. Attached Images __________________ 58 Fleetside 71 Cheyenne

02-18-2013, 08:45 PM	#8
Denee007 Senior Member Join Date: May 2011 Location: Cypress, Tx. Posts: 1,504	Re: Firewall Holes Wow, you work fast!! ; ) __________________ '72 Ford Bronco project(July 17 2021-?) https://67-72chevytrucks.com/vboard/...d.php?t=828015 59 Apache (sold 6-25-2021) 67 Ford Mustang (re-restored after Harvey) 1968 Jeep Cj5 (2-8-2020 to present) 1992 Jeep Yj (8-17-20 to present) (Jurassic build) www.Classiccarsandtools.com

02-19-2013, 06:36 PM	#9
booger1949 Registered User Join Date: Jul 2011 Location: bush louisiana Posts: 213	Re: Firewall Holes feel them all in but the brake an clutch an the steering column by that way if u need to add a hole u can redrill in a nice hidden spot an your firewall looks so much better

02-20-2013, 12:29 AM	#11
dirtracer81_2 Registered User Join Date: Feb 2013 Location: rocky gap va Posts: 99	Re: Firewall Holes Hey surf thanks for the pictures on the cab mounts. I have decided to go with ez chassis make life a little more simple hopefully. And glad i ran across this I was debating which holes myself the other night. Posted via Mobile Device

02-21-2013, 12:17 AM	#15
Dan in Pasadena Senior Member Join Date: Nov 2008 Location: Glendora, CA Posts: 6,336	Re: Firewall Holes Hopefully I won't get flamed all to hell! lol. Has anyone tried one of THESE firewall covers? http://www.nolimitparts.com/prodinfo.asp?number=CFWC It's a little pricey but for someone who dosn't know how to weld, maybe it's a consideration? I knew a guy that made his own from sheet metal and it looks fine. Since you cover the interior with sound deadner and carpet (typically) wouldn't this work fine? Do you guys consider it Mickey Mouse?

02-22-2013, 02:14 PM	#17
wsurf4me Registered User Join Date: Aug 2012 Location: Parrish, FL Posts: 120	Re: Firewall Holes Thanks Ogre! Just curious is there any reason you ran the front harness down the passenger side? I think I have a Painless harness and it was routed on the drivers side for both front and rear. I only have a few wires for the engine so it should be pretty straight forward. __________________ 58 Fleetside 71 Cheyenne

04-13-2013, 08:59 PM	#18
wsurf4me Registered User Join Date: Aug 2012 Location: Parrish, FL Posts: 120	Re: Firewall Holes So everything is welded up and new holes have been cut for the steering column and master cylinder. I'm trying to get ideas on how to run the harness, I like what Ogre did but am wondering what others have done. If I run it low how do I keep it out of sight or protected inside the cab? Attached Images __________________ 58 Fleetside 71 Cheyenne

04-14-2013, 01:40 AM	#19
SCHRUMGMC Registered User Join Date: Dec 2012 Location: North Carolina Posts: 4,989	Re: Firewall Holes What is with all of the holes ? __________________ 1971 GMC Sierra 1959 GMC 100

04-14-2013, 11:20 AM	#22
Dan in Pasadena Senior Member Join Date: Nov 2008 Location: Glendora, CA Posts: 6,336	Re: Firewall Holes solidaxel, What did you use to fill your smaller holes? It looks like a nail sticking out?



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04-14-2013, 02:27 PM	#24
SCHRUMGMC Registered User Join Date: Dec 2012 Location: North Carolina Posts: 4,989	Re: Firewall Holes Looks awesome now __________________ 1971 GMC Sierra 1959 GMC 100

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