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Old 04-11-2023, 02:39 AM   #7
Richard
Senior Member
 
Join Date: Dec 1999
Location: Southern California
Posts: 2,722
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.
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Richard
1972 K10 Custom Deluxe SWB Fleetside
My build https://67-72chevytrucks.com/vboard/...d.php?t=800746
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