Where does the manual choke cable go through the firewall? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Old Yeller 1970 · 01-05-2010, 12:49 AM

I reckon this question will mainly be directed at 67-68 owners since the later model trucks like mine had a thermostatic choke. Now I've installed a Holley with manual choke and need to run the cable. I figured the best way to route it would be in the original stock location. For those of you who have a truck so equipped, a photo or brief description would be appreciated.

Old Yeller 1970 · 01-05-2010, 09:19 PM

TTT
Anybody out there got a manual choke?

**Jurassic-1** · 01-06-2010, 09:38 AM

They usually go through the firewall next to the wiper hoses. It may have a mark to drill if it was not factory installed.

Old Yeller 1970 · 01-07-2010, 01:22 AM

Thanks for the tip. Mine doesn't have a mark there but it's easy to see where to drill a hole. Curiously, over on the left side of the firewall just a few inches to the left of the distributor there is a 1/4 factory punched hole. It might work to route the choke cable. It's right in line with where it needs to go to the carb but on the inside it's slightly below the top of the heater duct work.
We're having another cold spell so it'll be a few days before I get back to it and decide where to run it.
Thanks

Smallz72project · 01-07-2010, 03:09 AM

I know this is kind of a cluttered picture. But the green arrow is where the cable goes through the firewall and the purple arrow is the choke cable that you can follow up. The pass through is more so on the upper portion of the depression for the engine.

PS. This is a 1967 cab.

Old Yeller 1970 · 01-07-2010, 10:00 AM

Thanks for the pic. I'll put it right in that location. I've decided not to reinvent the wheel and attempt to run it through the other hole I found. Your photo shows the same hole I was talking about. Now I wonder why that's there?

68gmsee · 01-07-2010, 12:43 PM

I don't know if there's a difference between v8 and 6's, but here's a pic of the choke cable on my 68 GMC. It's the top cable.

**tkeduk8r** · 01-07-2010, 02:52 PM

I dont have any pics, BUT if you find a c40-c60 that had a 366-427 in it, they had manual choke holleys on IIRC all of them. A few board members own them and hopefully someone chimes in that has easy access to a pic or two from under the hoods of one of their's... Not a lot of help but hopefully a little...
--Mike

Old Yeller 1970 · 01-07-2010, 10:27 PM

You mean one like this?

I see the choke now. It's for sale about 25 min from my house.

01-05-2010, 12:49 AM	#1
Old Yeller 1970 DON'T TREAD ON ME Join Date: May 2005 Location: Crosby County, TX Posts: 989	Where does the manual choke cable go through the firewall? I reckon this question will mainly be directed at 67-68 owners since the later model trucks like mine had a thermostatic choke. Now I've installed a Holley with manual choke and need to run the cable. I figured the best way to route it would be in the original stock location. For those of you who have a truck so equipped, a photo or brief description would be appreciated. __________________ Old Yeller

01-05-2010, 09:19 PM	#2
Old Yeller 1970 DON'T TREAD ON ME Join Date: May 2005 Location: Crosby County, TX Posts: 989	Re: Where does the manual choke cable go through the firewall? TTT Anybody out there got a manual choke? __________________ Old Yeller

01-06-2010, 09:38 AM	#3
Jurassic-1 Registered User Join Date: Jul 2007 Location: New River Arizona Posts: 1,180	Re: Where does the manual choke cable go through the firewall? They usually go through the firewall next to the wiper hoses. It may have a mark to drill if it was not factory installed.

01-07-2010, 01:22 AM	#4
Old Yeller 1970 DON'T TREAD ON ME Join Date: May 2005 Location: Crosby County, TX Posts: 989	Re: Where does the manual choke cable go through the firewall? Thanks for the tip. Mine doesn't have a mark there but it's easy to see where to drill a hole. Curiously, over on the left side of the firewall just a few inches to the left of the distributor there is a 1/4 factory punched hole. It might work to route the choke cable. It's right in line with where it needs to go to the carb but on the inside it's slightly below the top of the heater duct work. We're having another cold spell so it'll be a few days before I get back to it and decide where to run it. Thanks __________________ Old Yeller

01-07-2010, 03:09 AM	#5
Smallz72project Registered User Join Date: May 2005 Location: Missoula, MT Posts: 273	Re: Where does the manual choke cable go through the firewall? I know this is kind of a cluttered picture. But the green arrow is where the cable goes through the firewall and the purple arrow is the choke cable that you can follow up. The pass through is more so on the upper portion of the depression for the engine. PS. This is a 1967 cab. __________________ - 1967 Chevy C10 shortbox - 1984 Chevy K10 "Mater"- SWB 305 manual, retired sheriffs truck, Current Frame Off Project - 1986 Chevy K10 LWB 350/350 Daily Driver/project Last edited by Smallz72project; 01-07-2010 at 03:11 AM. Reason: Forgot some information

01-07-2010, 10:00 AM	#6
Old Yeller 1970 DON'T TREAD ON ME Join Date: May 2005 Location: Crosby County, TX Posts: 989	Re: Where does the manual choke cable go through the firewall? Thanks for the pic. I'll put it right in that location. I've decided not to reinvent the wheel and attempt to run it through the other hole I found. Your photo shows the same hole I was talking about. Now I wonder why that's there? Attached Images __________________ Old Yeller

01-07-2010, 12:43 PM	#7
68gmsee Active Member Join Date: Jul 2007 Location: Centrally located between Houston, Austin and Waco. BCS area. Posts: 7,947	Re: Where does the manual choke cable go through the firewall? I don't know if there's a difference between v8 and 6's, but here's a pic of the choke cable on my 68 GMC. It's the top cable. Attached Images

01-07-2010, 02:52 PM	#8
tkeduk8r Senior Member Join Date: Apr 2001 Location: Alexandria, MN Posts: 1,462	Re: Where does the manual choke cable go through the firewall? I dont have any pics, BUT if you find a c40-c60 that had a 366-427 in it, they had manual choke holleys on IIRC all of them. A few board members own them and hopefully someone chimes in that has easy access to a pic or two from under the hoods of one of their's... Not a lot of help but hopefully a little... --Mike __________________ 63 C20 2WD, 230/SM420/4.11 73K 68 C30 dump truck, 327,SM425,4.56 66K original 68 C10 2WD SWB Stepper, 250/3-tree/3.73 66K.... Wifes 68 Buick Skylark Custom Conv., 350/TH400/2.56 In our family since '79 69 GMC 1500 SWB 2WD, 350/TH350/3.73 posi... 70 K10 SWB 4X4 4-sp,ps, pb, tilt, buckets, console, sliding back window (Need AC parts) WIP 72 Chevy K20 4x4 350/350/205/4.56 donor 72 Vette 350/M21/3.70 posi, triple black and super fast 84 Olds Cutlass Brougham 350/2004r/4.11 was Dad's

01-07-2010, 10:27 PM	#9
Old Yeller 1970 DON'T TREAD ON ME Join Date: May 2005 Location: Crosby County, TX Posts: 989	Re: Where does the manual choke cable go through the firewall? You mean one like this? I see the choke now. It's for sale about 25 min from my house. __________________ Old Yeller



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