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04-08-2023, 09:42 PM
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#1 |
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Registered User
 
Join Date: Sep 2003
Location: Denver, CO
Posts: 3,723
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Why two holes in the cab floor?
Pulled the plug in this cab floor today. Got me thinking that I've seen a lot of trucks with this plug, but never seen the 2nd hole used for anything.
Why did they put in the second hole? I searched but didn't find anything... |
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04-08-2023, 10:01 PM
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#2 |
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Registered User
Join Date: Jan 2003
Location: Safford,AZ
Posts: 3,613
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Re: Why two holes in the cab floor?
I think I remember them for cab alignment when welding.
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04-10-2023, 01:56 PM
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#3 |
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Senior Member
Join Date: Jun 2005
Location: Winona Lake, IN
Posts: 6,217
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Re: Why two holes in the cab floor?
That second hole comes in handy when converting to EFI, as you can use it for the return line.
__________________
70 C/10 SWB 402/TH400/3.73 "The Needy Beast" 200,000 Mile Club Disc Brake Club Owner installed options: Front Sway Bar Power Steering Power Brakes Cigar Lighter Courtesy Lights Deluxe Side Markers Wiper Delay Power windows Power Locks Sniper EFI 2015 Silverado 1500 LS 4.3/6L80/3.23 lowered 2" front & rear |
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04-10-2023, 01:56 PM
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#4 |
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Registered User
Join Date: Jul 2016
Location: Arkansas
Posts: 147
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Re: Why two holes in the cab floor?
Mine only has one hole. Is it certain years?
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04-10-2023, 03:20 PM
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#5 |
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Senior Member
Join Date: Feb 2009
Location: Northern Nevada
Posts: 7,129
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Re: Why two holes in the cab floor?
One is for fuel line(s) the other for the vent line, which many have since been removed
__________________
Tony 71 Custom Deluxe, SWB, 2WD, 402, A/C. I developed an assm. guide "kit" for restoring it from ground up. With assys, the guide accts for 1000s details such as OEM identifications& part numbers, written in short order. 700+ images include assm, illust., charts, and points of interest. Much of the info. applies to all 67-72 GM trucks, and to a lessor degree all 67-72 GM vehicles. My build thread, and more on the guide https://67-72chevytrucks.com/vboard/...d.php?t=730025 |
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04-10-2023, 04:35 PM
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#6 | |
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Registered User
Join Date: Sep 2003
Location: Denver, CO
Posts: 3,723
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Re: Why two holes in the cab floor?
Thanks for all the replies.
Quote:
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04-11-2023, 02:39 AM
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#7 |
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Senior Member
Join Date: Dec 1999
Location: Southern California
Posts: 2,710
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Re: Why two holes in the cab floor?
My 72 K10 built in Freemont, California and sold in Nevada to a California resident with the smog equipment has those two holes. Been some time since I removed the stock tank and installed the rear tank, but I seem to remember a line going though that hole. A 1" plug takes care of both.
__________________
Richard 1972 K10 Custom Deluxe SWB Fleetside My build https://67-72chevytrucks.com/vboard/...d.php?t=800746 |
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