1966 firewall holes... Anyone have pictures? - Chevelle Tech
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post #1 of 6 (permalink) Old Feb 7th, 18, 3:41 AM Thread Starter
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1966 firewall holes... Anyone have pictures?

On my '66, it's been disassembled for more than 30 years. I know there are several "extra" holes on the firewall (aftermarket coil for one), but there also a few others I am not sure about...

It is a 4-speed, with gauges and a tach, so it has the holes for the tach feed wire, the oil gauge line and the reverse light harness...

I am also not sure which holes go with the insulation pad and push-pins...

I'd like to weld up the un-needed holes...

Thanks
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post #2 of 6 (permalink) Old Feb 9th, 18, 3:11 PM Thread Starter
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Re: 1966 firewall holes... Anyone have pictures?

Anyone????

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post #3 of 6 (permalink) Old Feb 9th, 18, 11:20 PM
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Re: 1966 firewall holes... Anyone have pictures?

Mines been smoothed over so can't help.

66 SS-396/425 - M22 -3:73 -12 bolt
USN-SSBN 645-G
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post #4 of 6 (permalink) Old Feb 11th, 18, 2:09 PM
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Re: 1966 firewall holes... Anyone have pictures?

Looks like there was nothing on the pass side of my firewall. My tack line is in a different location: but as you can see there were some different holes drilled at one time. Tack groument andoil line groument appear to be origional.

Backup lights in different position also, probably should look at a fremount firewall.
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Last edited by Jim_66SS; Feb 11th, 18 at 2:27 PM.
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post #5 of 6 (permalink) Old Feb 11th, 18, 2:30 PM
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Re: 1966 firewall holes... Anyone have pictures?

Quote:
Originally Posted by 1966_L78 View Post
I am also not sure which holes go with the insulation pad and push-pins...
Thanks
I think that you have identified each hole properly based on the 3 66's I've worked on.

Also: You may already be aware - you are missing a pinch clamp on the steering shaft (mast per AIM) below the lower bearing. Without it the mast can slide up toward the cabin and result in an unwanted gap between the steering wheel and signal cup.
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post #6 of 6 (permalink) Old Feb 12th, 18, 12:30 AM Thread Starter
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Re: 1966 firewall holes... Anyone have pictures?

Quote:
Originally Posted by dream66 View Post
I think that you have identified each hole properly based on the 3 66's I've worked on.

Also: You may already be aware - you are missing a pinch clamp on the steering shaft (mast per AIM) below the lower bearing. Without it the mast can slide up toward the cabin and result in an unwanted gap between the steering wheel and signal cup.

Thanks,

Mainly on the center-driver's side of the firewall, I have those unknown holes... Several look drilled, but a few look almost stamped...


Yes, I am aware of the missing clamp... Now if I can only find it. That's what I get for disassembling this thing more than 30 years ago... Not visible in those pictures, but the lower column bearing race has slid a bit further down the column... kind of rusted in place now...

I have a new lower bearing and plastic bearing housing (IIRC, from Hinshaws?), as well as a new turn signal switch and upper bearing...
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