Question about fuel lines

[ivorton74]

Im about to start my 5.3 swap on my 74 c10 hopefully soon. I need to buy new lines but I need to know what kind to get and how much do u think i'll need...im going to be running the stock gas tank(which is on the passenger side) using the walbro gsl392 and the stock 5.3 fpr(5.3 is out of a 99 Silverado)...and also need to know what fittings I will need.

[truckdude239]

I used teflon lined steel braid line

[truckdude239]

http://67-72chevytrucks.com/vboard/s...d.php?t=349201

[BR3W CITY]

You'll want to use good old hard line for as much of the run as possible. Its cheap, standard to work with, and hard to mess up really bad....and cheap if you do. Cheap. Stock sizes are 3/8 feed and 5/16 return.

Then you'll want to choose a size for your braided lines (assuming you want to go that route, which is highly advised). You can use -6 for both ways, but I would encourage you to think about going to -8 if you have any plans on going for higher power. While -6 is enough to carry fuel well into the 400's, once you start needing the larger fuel pumps, twin pumps, or aftermarket fuel rail components, -8 seems to be the more standard I/O size. If not, then disregard that issue.

I bought a 10ft roll of -6 the first time around, but ended up needing roughly 12 feet. Fittings will be based on the components you choose to run, and where you choose to position things. The only ones that are at all special are; (2) hard tube->AN adapters, (2) AN->PTC adapters. All the rest of the AN fittings in the system will be combinations of male, female, and angled fittings to mate all your stuff together.

Make sure to look carefully at any fuel filter you choose. It needs to be of a sufficient micron level, be rated for pressure, and preferably have I/O sizes that don't require lots of adapting. Keeping things simple and direct is the best way to keep fitting costs down for AN setups.

[ivorton74]

Originally Posted by BR3W CITY

You'll want to use good old hard line for as much of the run as possible. Its cheap, standard to work with, and hard to mess up really bad....and cheap if you do. Cheap. Stock sizes are 3/8 feed and 5/16 return.

Then you'll want to choose a size for your braided lines (assuming you want to go that route, which is highly advised). You can use -6 for both ways, but I would encourage you to think about going to -8 if you have any plans on going for higher power. While -6 is enough to carry fuel well into the 400's, once you start needing the larger fuel pumps, twin pumps, or aftermarket fuel rail components, -8 seems to be the more standard I/O size. If not, then disregard that issue.

I bought a 10ft roll of -6 the first time around, but ended up needing roughly 12 feet. Fittings will be based on the components you choose to run, and where you choose to position things. The only ones that are at all special are; (2) hard tube->AN adapters, (2) AN->PTC adapters. All the rest of the AN fittings in the system will be combinations of male, female, and angled fittings to mate all your stuff together.

Make sure to look carefully at any fuel filter you choose. It needs to be of a sufficient micron level, be rated for pressure, and preferably have I/O sizes that don't require lots of adapting. Keeping things simple and direct is the best way to keep fitting costs down for AN setups.

kool man thanks!! do u have any pics of ur fuel setup?

[BR3W CITY]

Click the big blue words in my signature. You can look at everything along the way, more or less.

[ivorton74]

how do I run the return line with my stock fuel tank?

[BR3W CITY]

Get the newer style sender/module from the later 80's trucks, tho someone who actually has used the sender may want to step in for specifics on that.

Or you can drill a hole in the top of the thank and thread/weld a fitting on to attach the return line. Its under less pressure, and can just piss into the tank anywhere where there won't be other fluid to fight (so anywhere above the max fill line on the tank)

[ls1nova71]

Originally Posted by BR3W CITY

Get the newer style sender/module from the later 80's trucks, tho someone who actually has used the sender may want to step in for specifics on that.

Or you can drill a hole in the top of the thank and thread/weld a fitting on to attach the return line. Its under less pressure, and can just piss into the tank anywhere where there won't be other fluid to fight (so anywhere above the max fill line on the tank)

The newer sender that will accept a fuel pump won't fit in a '74 tank. Your best bet would be to get an '87 tank. But if you don't want to do thatyoull have to add a return to your tank or sender.

[Gobuffalo]

The aftermarket has a tube with a fitting already in it to hook the return line into. You get the tube based on the size of your filler neck hose and splice it in. Make sure you point the inside tube at the tank. Very easy to make.
You can also buy a weld in flange and all of the parts to make a pick-up and hold the pump/sock in your existing tank. Has provisions for a return line. About $30.00. An in tank pump will last much longer as the fuel cools the pump. Check your custom fuel tank builders.

[ivorton74]

Originally Posted by ls1nova71

The newer sender that will accept a fuel pump won't fit in a '74 tank. Your best bet would be to get an '87 tank. But if you don't want to do thatyoull have to add a return to your tank or sender.

I just found this sender that has 3 outlets at the top. its a dorman #692078...can one of those outlets be used for a return line?

[BR3W CITY]

Thats what one of the smaller lines is for. Large one goes to supply, other two are return and vent.

I think thats the sender I was referring to, that LS1Nova said didn't fit the 74. Is the lock ring the same size as what you have?

[ivorton74]

I went online looking for one specifically for my 74 and alot of the senders ive seen has those lines on em...im not sure if the lock ring is the same size...ill have to check it out

[ivorton74]

found this one as well specifically for my truck on rockauto and napa

spectra #fg05c

theres also fg05b with just two outlets(not shown)

[solidaxel]

Take a look at the one for a 87 pick up, the same but able to attach a in tank fuel pump for a 2002 Camaro, and the gauge will read the same as your 74