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02-15-2017, 05:18 PM
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#1 |
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Registered User
Join Date: Oct 2014
Location: Chattanooga TN
Posts: 75
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Help me identify these holes on my firewall
I've searched and found several threads, and pictures..but none seem to have these holes marked. This is the drivers side around where the fuseblock comes out.
 I also know that either #1 or #3 is for the speedo cable, but I'm not sure which one? Unfortunately I took my truck apart years ago, and don't seem to have any pictures of the fiewall. 
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02-15-2017, 07:20 PM
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#2 |
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Registered User
Join Date: Jan 2009
Location: San Antonio, Texas
Posts: 1,374
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Re: Help me identify these holes on my firewall
Looks like you have a few extra holes than a stock, or maybe there's some differences I'm not aware of between the various years?
EDIT: Ok, I went and looked at mine. I have a '72 On mine Hole 1 = Speedo Cable Hole 2 = rubber plug that holds firewall insulation in Hole 3 = Transmission Controlled Spark (TCS) wiring Hole 4 = I don't have on my firewall Hole 5 = (Lower #4 hole) Rubber plug that holds firewall insulation
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1972 C10 LWB, 350/350 Deconstruction began 5/2009, mostly completed restoration, 5/2017 Last edited by dfwright; 02-15-2017 at 07:45 PM. |
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02-15-2017, 07:22 PM
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#3 |
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Old member
Join Date: Jan 2002
Location: Liberty, & Garden City S.C. , U.S.
Posts: 19,936
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Re: Help me identify these holes on my firewall
Something doesn't look right here by your picture. Where is the steering column hole?
Here are all the ones I could find.  This hole ? (finger) That is the Park brake cable on '67-'68 models. Just removed mine last week 
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1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs. |
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02-15-2017, 10:35 PM
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#4 |
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Registered User
Join Date: Oct 2014
Location: Chattanooga TN
Posts: 75
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Re: Help me identify these holes on my firewall
Excellent, thank you guys! I ended up filling all of them except the speedo hole. Since I'm putting dynamat in, I'm not keeping the original insulation. And since both holes on #4 are the same size and perfectly round ,I thought something mounted there! Good call on #5
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