The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1967 - 1972 Chevrolet & GMC Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 04-02-2008, 06:04 PM   #1
c10beezer
Registered User
 
c10beezer's Avatar
 
Join Date: Apr 2008
Location: phx az
Posts: 4
Plumbing to gas tank

Can someone help me out here? I have a 68 c10 that I bought in pieces (someone elses project). I am running my fuel lines to the stock tank behind the seat. On the sending unit I have two lines 3/8 and I am guessing 1/4. The 3/8 would be the feed but would the return be that small? My carb return is a 3/8 line. My other question is on the passenger side of the tank there is a 3/8 fitting what is that for? Thanks for your help.
c10beezer is offline   Reply With Quote
Old 04-03-2008, 06:42 PM   #2
c10beezer
Registered User
 
c10beezer's Avatar
 
Join Date: Apr 2008
Location: phx az
Posts: 4
Question Re: Plumbing to gas tank

Am I the only crazy one who is going to run the stock tank?
c10beezer is offline   Reply With Quote
Old 04-03-2008, 08:02 PM   #3
haysonj
Registered User
 
haysonj's Avatar
 
Join Date: Dec 2007
Location: Santa Maria, Ca.
Posts: 1,423
Re: Plumbing to gas tank

I'm not sure but I don't think that is a stock tank for a 68. My 69 only has the one line out of the sending unit and unless you have a big block it will not be 3/8
__________________
69 Chevy 4x4 383 Power

Last edited by haysonj; 04-03-2008 at 08:03 PM.
haysonj is offline   Reply With Quote
Old 04-03-2008, 08:11 PM   #4
cameeks
Long Fleet Club
 
cameeks's Avatar
 
Join Date: Aug 2006
Location: Deer Park, TX
Posts: 5,666
Re: Plumbing to gas tank

sounds like a tank from a truck with a charcoal canister. The 3/8 is the feed and the 1/4 would be the vent.
__________________
Chris Meeks

'69 Chevy Custom/10 Long Bed <-- Thread of the work I did before selling.
Truck is now finished to the new owners design and running around.
I was shown some pictures of the finished product. At least it survived the junk yard.

FAQ Index by Krue Site Vendors Subscribe Here Forum Rules
cameeks is offline   Reply With Quote
Old 04-03-2008, 08:13 PM   #5
cameeks
Long Fleet Club
 
cameeks's Avatar
 
Join Date: Aug 2006
Location: Deer Park, TX
Posts: 5,666
Re: Plumbing to gas tank

Quote:
Originally Posted by haysonj View Post
I'm not sure but I don't think that is a stock tank for a 68. My 69 only has the one line out of the sending unit and unless you have a big block it will not be 3/8
all the tanks are 3/8 feed lines.
__________________
Chris Meeks

'69 Chevy Custom/10 Long Bed <-- Thread of the work I did before selling.
Truck is now finished to the new owners design and running around.
I was shown some pictures of the finished product. At least it survived the junk yard.

FAQ Index by Krue Site Vendors Subscribe Here Forum Rules
cameeks is offline   Reply With Quote
Old 04-03-2008, 08:39 PM   #6
Jim_PA
Registered User
 
Join Date: May 2005
Location: PA
Posts: 2,696
Re: Plumbing to gas tank

Quote:
Originally Posted by cameeks View Post
all the tanks are 3/8 feed lines.
Mine is 5/16, currently in the process of upgrading to 3/8 with all new lines up to the carb.
Jim_PA is offline   Reply With Quote
Old 04-03-2008, 08:41 PM   #7
c10beezer
Registered User
 
c10beezer's Avatar
 
Join Date: Apr 2008
Location: phx az
Posts: 4
Re: Plumbing to gas tank

It may be a later tank, the guy I got it from bought a wrecked 72 for parts.
Let me describe the tank an fittings a little better. There is a vent at the filler, sending unit has two lines 3/8 and about 1/4, passenger side of tank has another line in the corner it looks to be a little smaller than 3/8. Is ther a way for me to still use this?
c10beezer is offline   Reply With Quote
Old 04-03-2008, 08:44 PM   #8
haysonj
Registered User
 
haysonj's Avatar
 
Join Date: Dec 2007
Location: Santa Maria, Ca.
Posts: 1,423
Re: Plumbing to gas tank

Quote:
Originally Posted by cameeks View Post
all the tanks are 3/8 feed lines.
If you look at the sending units on LMC only the big blocks are 3/8 the rest are 5/16 Just rechecked LMC I was wrong the two barrel carb is 5/16 and the four barrel is 3/8
__________________
69 Chevy 4x4 383 Power

Last edited by haysonj; 04-03-2008 at 08:54 PM.
haysonj is offline   Reply With Quote
Old 04-03-2008, 09:04 PM   #9
cameeks
Long Fleet Club
 
cameeks's Avatar
 
Join Date: Aug 2006
Location: Deer Park, TX
Posts: 5,666
Re: Plumbing to gas tank

Quote:
Originally Posted by haysonj View Post
If you look at the sending units on LMC only the big blocks are 3/8 the rest are 5/16 Just rechecked LMC I was wrong the two barrel carb is 5/16 and the four barrel is 3/8
Umm



When I was searching for a tank I have never saw where they asked what size I needed and the one I got was 3/8. I stand with a foot in my mouth
__________________
Chris Meeks

'69 Chevy Custom/10 Long Bed <-- Thread of the work I did before selling.
Truck is now finished to the new owners design and running around.
I was shown some pictures of the finished product. At least it survived the junk yard.

FAQ Index by Krue Site Vendors Subscribe Here Forum Rules
cameeks is offline   Reply With Quote
Old 04-03-2008, 09:20 PM   #10
70inline6
Registered User
 
Join Date: Jan 2008
Location: Pell City, AL
Posts: 255
Re: Plumbing to gas tank

Quote:
Originally Posted by c10beezer View Post
It may be a later tank, the guy I got it from bought a wrecked 72 for parts.
Let me describe the tank an fittings a little better. There is a vent at the filler, sending unit has two lines 3/8 and about 1/4, passenger side of tank has another line in the corner it looks to be a little smaller than 3/8. Is ther a way for me to still use this?
You can still use it but as written, it is from a charcoal canister equipped vehicle. In my research, all V8's used the 3/8 sending unit line and the 6's used the 5/16. You can either cap the vents or plumb the sending unit and pass side vent (t'd) to a canister.

Don't plumb them directly to the carb or your tank will be under constant vacuum. It couldn't hurt to find a junk yard canister and plumb it in - I can smell fumes in my garage whenever I don't drive mine for a day or two.
70inline6 is offline   Reply With Quote
Old 04-03-2008, 09:24 PM   #11
cameeks
Long Fleet Club
 
cameeks's Avatar
 
Join Date: Aug 2006
Location: Deer Park, TX
Posts: 5,666
Re: Plumbing to gas tank

Why couldnt he just cap off the other lines. My '69 tank only has one line out to the carb and that is factory.
__________________
Chris Meeks

'69 Chevy Custom/10 Long Bed <-- Thread of the work I did before selling.
Truck is now finished to the new owners design and running around.
I was shown some pictures of the finished product. At least it survived the junk yard.

FAQ Index by Krue Site Vendors Subscribe Here Forum Rules
cameeks is offline   Reply With Quote
Old 04-04-2008, 02:43 AM   #12
c10beezer
Registered User
 
c10beezer's Avatar
 
Join Date: Apr 2008
Location: phx az
Posts: 4
Re: Plumbing to gas tank

Ok. if the line on the passenger side is for the canister filter, the smaller line on the sending unit is a return.? I really appreciate the help.
c10beezer is offline   Reply With Quote
Reply

Bookmarks


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 09:09 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com