Clutch linkage hole in firewall 1970 C 20 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Arnulfo · 08-03-2017, 12:15 PM

Is there some kind of factory plug that covers the hole on automatics?
Thanks

**FirstOwner69** · 08-03-2017, 02:44 PM

There were 2 types of plugs/covers used from '67 through '72. I believe the push-in plastic plug was used through 1970. After that, an oval steel plate with a screw at the top and bottom was used along with a gasket between the plate and firewall. The plastic plugs had a habit of popping out of the hole perhaps due to the pressure caused when the doors were closed.

Here's an old for sale thread showing the correct plastic plugs. Unfortunately, the seller hasn't been here since 10-15-16.

http://67-72chevytrucks.com/vboard/s...d.php?t=535199

EDIT: Added picture of the steel version with gasket and screws.

dfwright · 08-03-2017, 02:49 PM

I don't know about the plastic insert, but the metal cover and gasket are repop'd
You can get one from Classicparts.com

(1967-81) Clutch Rod Firewall Delete Plate

Arnulfo · 08-03-2017, 05:15 PM

Many thanks for the info!

old and rusty · 11-17-2017, 11:35 AM

Do these plugs go on from inside the cab or from the outside via the engine compartment?

cleszkie · 11-17-2017, 12:16 PM

From the outside.

old and rusty · 11-17-2017, 01:15 PM

thanks, i guess i'll get me one.

08-03-2017, 12:15 PM	#1
Arnulfo Registered User Join Date: Aug 2015 Location: Los angeles Posts: 163	Clutch linkage hole in firewall 1970 C 20 Is there some kind of factory plug that covers the hole on automatics? Thanks

08-03-2017, 02:44 PM	#2
FirstOwner69 Senior Member Join Date: May 2010 Location: Wisconsin & Arizona Posts: 4,852	Re: Clutch linkage hole in firewall 1970 C 20 There were 2 types of plugs/covers used from '67 through '72. I believe the push-in plastic plug was used through 1970. After that, an oval steel plate with a screw at the top and bottom was used along with a gasket between the plate and firewall. The plastic plugs had a habit of popping out of the hole perhaps due to the pressure caused when the doors were closed. Here's an old for sale thread showing the correct plastic plugs. Unfortunately, the seller hasn't been here since 10-15-16. http://67-72chevytrucks.com/vboard/s...d.php?t=535199 EDIT: Added picture of the steel version with gasket and screws. Attached Images Last edited by FirstOwner69; 08-03-2017 at 02:59 PM.

08-03-2017, 02:49 PM	#3
dfwright Registered User Join Date: Jan 2009 Location: San Antonio, Texas Posts: 1,374	Re: Clutch linkage hole in firewall 1970 C 20 I don't know about the plastic insert, but the metal cover and gasket are repop'd You can get one from Classicparts.com (1967-81) Clutch Rod Firewall Delete Plate __________________ 1972 C10 LWB, 350/350 Deconstruction began 5/2009, mostly completed restoration, 5/2017

08-03-2017, 05:15 PM	#4
Arnulfo Registered User Join Date: Aug 2015 Location: Los angeles Posts: 163	Re: Clutch linkage hole in firewall 1970 C 20 Many thanks for the info!

11-17-2017, 11:35 AM	#5
old and rusty Registered User Join Date: Mar 2017 Location: az Posts: 5	Re: Clutch linkage hole in firewall 1970 C 20 Do these plugs go on from inside the cab or from the outside via the engine compartment?

11-17-2017, 12:16 PM	#6
cleszkie Registered User Join Date: Feb 2003 Location: Santa Ana, CA Posts: 2,191	Re: Clutch linkage hole in firewall 1970 C 20 From the outside.

11-17-2017, 01:15 PM	#7
old and rusty Registered User Join Date: Mar 2017 Location: az Posts: 5	Re: Clutch linkage hole in firewall 1970 C 20 thanks, i guess i'll get me one.



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