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

RatRod68 · 12-17-2012, 08:34 AM

Hey everyone, I was working on my 68 this weekend and I found a ginormous hole behind the brake booster. It looks as though a grommet belongs there. I checked Brothers and LMC and could not find anything for that specific hole. I was hoping that someone here could let me know where to get whatever seals that up!

here are some pictures

Top of booster looking down

Side of booster

Looking up from under the dash

There is also this hole that is covered with duck tape. Anyone know what this is or what goes here?

68gmsee · 12-17-2012, 09:54 AM

GMCPaul or others sell it. It's the pushrod firewall seal. I have it on my 68. (Posted previously): http://67-72chevytrucks.com/vboard/s...d.php?t=379915

Added info: GMC Pauls's site is a little confusing so look here and scroll down to it- pn 8699126. Also you may want to get the boot/seal for the back of the power booster itself just below. pn 2522016.

bonnieclyde100 · 12-17-2012, 10:44 AM

lmc does carry it part number 30-1914

RatRod68 · 12-17-2012, 01:41 PM

I had no idea what it even was! Thanks so much guys!!!

What about the hole in the bottom of the firewall near the heater vent/box? Its slightly right behind the gas pedal. Its the hole with the duck tape over it.

RatRod68 · 12-17-2012, 02:05 PM

alright, I just went to 3 different sites, and it seems as though there are 3 different parts. One of them has a big ol hole in the middle and that seems to be the PN's you guys listed above. Then there is another one with 5 holes. Then there is another one that doesn't have the "lip" like the PN 30-1914 and 2522016.

I checked Southern KY Classics, and it looks like they only have the one with 5 holes

bollybib · 12-17-2012, 04:09 PM

Wes at Classic Heartbeat has the correct ones. I got mine from him.

12-17-2012, 08:34 AM	#1
RatRod68 Registered User Join Date: Aug 2007 Location: Kentucky Posts: 828	Holes in the Firewall... Hey everyone, I was working on my 68 this weekend and I found a ginormous hole behind the brake booster. It looks as though a grommet belongs there. I checked Brothers and LMC and could not find anything for that specific hole. I was hoping that someone here could let me know where to get whatever seals that up! here are some pictures Top of booster looking down Side of booster Looking up from under the dash There is also this hole that is covered with duck tape. Anyone know what this is or what goes here? __________________ build Threads: Nasty 68 C10. My lil hotrod Leftovers 68 C20 D-Ranged Ford Ranger on steroids Semper Fi

12-17-2012, 09:54 AM	#2
68gmsee Active Member Join Date: Jul 2007 Location: Centrally located between Houston, Austin and Waco. BCS area. Posts: 7,947	Re: Holes in the Firewall... GMCPaul or others sell it. It's the pushrod firewall seal. I have it on my 68. (Posted previously): http://67-72chevytrucks.com/vboard/s...d.php?t=379915 Added info: GMC Pauls's site is a little confusing so look here and scroll down to it- pn 8699126. Also you may want to get the boot/seal for the back of the power booster itself just below. pn 2522016. __________________ 68 GMC 250/3 speed Saginaw p/b p/s 69 Chevy 350/350 currently in pieces still lookin for a cab 06 Trailblazer I just want a vehicle that I can work on, that won't talk to me, leave error msgs or keep track of how I drive... Last edited by 68gmsee; 12-17-2012 at 10:31 AM.

12-17-2012, 10:44 AM	#3
bonnieclyde100 Registered User Join Date: Jan 2012 Location: Henderson,TX Posts: 336	Re: Holes in the Firewall... lmc does carry it part number 30-1914

12-17-2012, 01:41 PM	#4
RatRod68 Registered User Join Date: Aug 2007 Location: Kentucky Posts: 828	Re: Holes in the Firewall... I had no idea what it even was! Thanks so much guys!!! What about the hole in the bottom of the firewall near the heater vent/box? Its slightly right behind the gas pedal. Its the hole with the duck tape over it. __________________ build Threads: Nasty 68 C10. My lil hotrod Leftovers 68 C20 D-Ranged Ford Ranger on steroids Semper Fi

12-17-2012, 02:05 PM	#5
RatRod68 Registered User Join Date: Aug 2007 Location: Kentucky Posts: 828	Re: Holes in the Firewall... alright, I just went to 3 different sites, and it seems as though there are 3 different parts. One of them has a big ol hole in the middle and that seems to be the PN's you guys listed above. Then there is another one with 5 holes. Then there is another one that doesn't have the "lip" like the PN 30-1914 and 2522016. I checked Southern KY Classics, and it looks like they only have the one with 5 holes __________________ build Threads: Nasty 68 C10. My lil hotrod Leftovers 68 C20 D-Ranged Ford Ranger on steroids Semper Fi

12-17-2012, 04:09 PM	#6
bollybib Registered User Join Date: Nov 2010 Location: Carlsbad, CA Posts: 1,584	Re: Holes in the Firewall... Wes at Classic Heartbeat has the correct ones. I got mine from him. __________________ - Jim - My Daily Driver is a 1969 Chevrolet Custom/20 Fleetside 350/TH400/Eaton H052 4.10 and its Project thread is here http://67-72chevytrucks.com/vboard/s...d.php?t=456911

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