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Old 03-24-2004, 11:36 AM   #1
wxman1
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Join Date: May 2002
Location: mt juliet, tennessee, usa
Posts: 237
Fuel Line - Schmuel Line

I've had my 69 C-10 P/U for about 2 years
now. I have replaced most of the guages with autometer stuff. However the fuel guage
does not indicate correctly. With the fuel
guage on "E", it registers 1/2 tank if I put in
5 gallons. Way off. OK...so at the Louisville
Swap Meet last weekend I bought a new
fuel sender. Go to install it and the old fuel
line is smaller and doesn't fit the fitting on the new fuel sender. The current fuel line is a 5/16. After trying a couple of larger sizes on the sending unit coupler, it appears to fit a 3/8 fuel line.

So here's my question. Anybody out there
got a bone stock 69 C-10 P/U with a 350
V8 ? If so what size fuel line do you have in
you truck? Also how many sections of hard
line do you have and how many sections of
rubber line?

I tried looking in my 69 C-10 Service
Manual and also the LMC catalog. Can't
find anything that states the size of the
fuel line.

Jim
Mt Juliet

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Old 03-24-2004, 11:43 AM   #2
CPNE
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Location: NH
Posts: 6,662
3/8 for 4bbl carb (350/327) small block and big blocks.

5/16 for all others (2bbl small block (307) and all sixes)
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Currently on or near the homestead:

67 Chevy SWB 2WD stepside 350/3 on tree (Pat's)
67 GMC SWB 2WD Fleet 402/auto (Brian's under construction)
67 Chevy 3/4 ton 2WD 402/auto (Business Hauler)
67 Chevy 1 ton dually 2WD 396/4 speed (Former business hauler, Needs TLC)
68 Chevy 1/2 ton Suburban 2WD 250 six/3 on tree (Brian's Needs TLC)
70 Chevy 3/4 ton 4WD 350/4 speed (Pat's - Disguised as a 68 GMC)
71 Chevy SWB stepside (Crushed by tree - parts donor)
72 Chevy 3/4 ton 4WD (Parts donor)
72 Chevy 3/4 ton 4WD Suburban (Parts Donor)
72 GMC 3/4 ton 4WD 292 six/4 speed (Mine - Disguised as a 67 GMC)
81 GMC 4WD Dually Dump Body 350/4 speed (Business Hauler)
82 Camaro Z/28 355/Super T-10 (Pat's toy)
93 Caprice 9C1 (Brian's Cop Car)
02 Toyota Camry (Reliable but a souless steel and plastic hulk)
2011 2SS RS Camaro M6 Factory Hurst Shifter

Maybe I need to sell some of this crap

Yet another Bozo with a sawz-all
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Old 03-24-2004, 12:50 PM   #3
nightmare
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Location: Hammond, WI
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I had the same issue on my '69 GMC. but i had some brass reducers and just used that. i wrapped the threads in teflon tape, and that helped tremendously. it had a 350 with a 2bbl, but the line was a 3/8, and the sending unit was 5/16. i only had 2 rubber sections: one under the cab that went from the line in the cab to the line on the frame rail, and one that went from the line on the frame rail to the fuel pump on the engine.
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2001 Dakota R/T - Silver CC - 1 of 1671 •360 w/46RE •392 limited slip
1972 Chevy Suburban - Turquoise/Black
1969 Chevy C/10 - Blue LWB •350 w/ 700R4 •3.73 posi •PS PB A/C - SOLD

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Old 03-24-2004, 12:51 PM   #4
cdowns
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fuel sending units in these things ain't an exact science the 5gallons for 1/2tank thing would pretty much be the norm
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