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 1973 - 1987 Chevrolet & GMC Squarebody Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 05-08-2018, 08:09 PM   #1
epfatboy
Registered User
 
Join Date: Mar 2018
Location: Barrington nh
Posts: 68
1074 C10 Fuel Tank - LSx Swap

Swapping out the tank in my '74 for a '87 tank and sending unit.

What filler necks are being used, I plan to keep my stock filler location. I'd try to reuse the original but it's a little banged up so I figured I'd replace it.


One idea I had was to use a flexible aluminum radiator hose with rubber couplings but I was wondering if there is any safety issues with that. Something like this.


https://www.jegs.com/i/JEGS/555/5112...RoC7-4QAvD_BwE
epfatboy is offline   Reply With Quote
Old 05-09-2018, 06:00 PM   #2
Goats86
Registered User
 
Join Date: Dec 2010
Location: Waxahachie, Texas
Posts: 132
Re: 1074 C10 Fuel Tank - LSx Swap

buy a new filler neck, they are not very expensive. for hose, Napa sells bulk fuel filler hose you can cut to fit. i would not use anything that is not fuel rated.
Goats86 is offline   Reply With Quote
Old 05-10-2018, 04:13 AM   #3
LeesTruk
Registered User
 
Join Date: Mar 2015
Location: Manchester, CT
Posts: 332
Re: 1074 C10 Fuel Tank - LSx Swap

There is a difference in the later model tanks that you might not be aware of. The fuel fill inlet port is 1 3/4" vs. a 1 1/2" inlet on the earlier models. I found this out when I did my LS swap. Despite all the different ways to overcome this obstacle, as found on the internet, the fix is easy and inexpensive. The filler neck is actually 1 3/4". It's the hose that tapers down to the smaller size. Here are some pics of the Gates fuel hose to get and where to cut it to fit
Attached Images
   
LeesTruk is offline   Reply With Quote
Old 05-10-2018, 10:17 AM   #4
epfatboy
Registered User
 
Join Date: Mar 2018
Location: Barrington nh
Posts: 68
Re: 1074 C10 Fuel Tank - LSx Swap

Quote:
Originally Posted by LeesTruk View Post
There is a difference in the later model tanks that you might not be aware of. The fuel fill inlet port is 1 3/4" vs. a 1 1/2" inlet on the earlier models. I found this out when I did my LS swap. Despite all the different ways to overcome this obstacle, as found on the internet, the fix is easy and inexpensive. The filler neck is actually 1 3/4". It's the hose that tapers down to the smaller size. Here are some pics of the Gates fuel hose to get and where to cut it to fit

NICE! Thanks for the part number and info. My tank should be here shortly, I'll call a few parts stores now to see if they have the hose.

Did you use your orig fuel line as a return line? I'm going to make up a braided line for the feed, thinking 6an to my FPR and then just use tube to 6an fittings to plumb in the return using the existing fuel line. My FPR will feed stock truck fuel rails, gotta take a look and see what is needed to plumb into that.
epfatboy is offline   Reply With Quote
Old 05-10-2018, 06:15 PM   #5
LeesTruk
Registered User
 
Join Date: Mar 2015
Location: Manchester, CT
Posts: 332
Re: 1074 C10 Fuel Tank - LSx Swap

Seems as though lots of folks jump on the "Braided hose/AN fitting" wagon for some reason. A lot of money for no apparent gain, other than maybe self-satisfaction? Personally, I used Dorman fuel lines and fittings, available at most "Real" auto parts stores. But then, that's my preference, having used the repair lines in the shop where I worked before retiring. My engine is an '05 5.3L, and uses a returnless system, so only one fuel line to the engine. Without digging up receipts, I'm thinking I have less than $50 in the nylon tubing, connectors, and junctions. The system has been in use for more than two years now, without problems. Here's some pics. I've posted them before so you may have seen them, I dunno;
Attached Images
     
LeesTruk is offline   Reply With Quote
Old 05-13-2018, 10:23 AM   #6
epfatboy
Registered User
 
Join Date: Mar 2018
Location: Barrington nh
Posts: 68
Re: 1074 C10 Fuel Tank - LSx Swap

The benefit of SS Braided for me is I just run line the entire length with insultater . Do you just run line down the frame rails or do you splice in some hard line too?

Never used those dorman quick connects before but willing to give it a try, they look pretty inexpensive and I have the disconnect tools already. If I do run these the FPR connections would be AN to Tube which is not big deal. I assume you run a hose clamp on the barb ends or are they just push fittings?
epfatboy is offline   Reply With Quote
Old 05-13-2018, 10:27 AM   #7
moregrip
Registered User
 
moregrip's Avatar
 
Join Date: Dec 2008
Location: Las Vegas, NV
Posts: 651
Re: 1074 C10 Fuel Tank - LSx Swap

Quote:
Originally Posted by LeesTruk View Post
Seems as though lots of folks jump on the "Braided hose/AN fitting" wagon for some reason. A lot of money for no apparent gain, other than maybe self-satisfaction? Personally, I used Dorman fuel lines and fittings, available at most "Real" auto parts stores. But then, that's my preference, having used the repair lines in the shop where I worked before retiring. My engine is an '05 5.3L, and uses a returnless system, so only one fuel line to the engine. Without digging up receipts, I'm thinking I have less than $50 in the nylon tubing, connectors, and junctions. The system has been in use for more than two years now, without problems. Here's some pics. I've posted them before so you may have seen them, I dunno;
that's a very nice job right there
__________________

2018 2500HD 4x4 Duramax CCSB
2016 Suburban 2wd
1973 C10 "Always a project truck"
moregrip is offline   Reply With Quote
Old 05-15-2018, 05:03 AM   #8
LeesTruk
Registered User
 
Join Date: Mar 2015
Location: Manchester, CT
Posts: 332
Re: 1074 C10 Fuel Tank - LSx Swap

No hose clamps are needed, or used. The tubing performs a solid seal when pressed over the barbs of the fittings. One thing of note; DO NOT heat the tubing prior to fitting insertion. Nylon tubing does Not have a "memory", meaning that it will not return to original size if stretched by heat
LeesTruk is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

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 09:59 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2018, vBulletin Solutions Inc.
Copyright 1997-2013 67-72chevytrucks.com