Fuel line fittings

[A1971Blazer]

I got this sending unit and tank from a member here to use on my LS1 swap...the sending unit has threaded connections with o-rings......anyone know off hand what the correct adapter is for this type...?

[mongocanfly]

Might measure it and see what size it is..I found two diff sizes. (14mm× 1.5 and 16mm×1.5...adapters to an -6 are...GM*Fuel*Line*Adapter, -6 AN*Hose*End*to Fem 14mm x 1.5 (Earls 9894DBH)GM Fuel Line Adapter, -6 AN*Hose End*to Fem 16mm x 1.5 (Earls 9894DBJ)

[MotorHead Lon]

Russell part number 640830 and 640820 are the adapters you need.

[A1971Blazer]

Originally Posted by mongocanfly

Might measure it and see what size it is..I found two diff sizes. (14mm× 1.5 and 16mm×1.5...adapters to an -6 are...GM*Fuel*Line*Adapter, -6 AN*Hose*End*to Fem 14mm x 1.5 (Earls 9894DBH)GM Fuel Line Adapter, -6 AN*Hose End*to Fem 16mm x 1.5 (Earls 9894DBJ)

I did measure and they are 14mm and 16mm......thanks for the reply...that looks like what I need....

[Big Port Jimmy 6]

I would cut an re-flare to JIC/AN.
I am unaware of a union to go to that type of flare. Ive always heard them called pilot flares. Should be a 16mm and 14 mm metric threads. Dorman makes some lines and fittings
http://www.dormanproducts.com/p-3314...origin=keyword
Its unclear the pressure rating. 5/16 is 800-933.
These go to nylon line
http://www.dormanproducts.com/p-3998...origin=keyword

Hope this helps Jay

Well I stand corrected above. Jay

[A1971Blazer]

I really want to make my own hard lines...I have a AN flare kit if I can find the female flare nuts....or would it be better to just use stainless braided lines and AN adapters...?

[Big Port Jimmy 6]

The Russel adapters are the way to go. They will eliminate at least one joint. I would run a line from the chassis to the tank, to help with flex and to be easier to hook up after install. I am going to replace the hose on my swap with some of this not as pretty as braided but the vapor aspect is interesting. https://www.holley.com/products/plum...or_guard_hose/

[crakarjax]

Sender supply M14x1.5 to -6an
9894dbherl

Sender return M16x1.5 to -6an
9894dbjerl

$8 each @ summit

Hose in case you need it:
https://www.aliexpress.com/item/AN6-...999.261.LQe4S5

[A1971Blazer]

Thanks for all the help guys........much appreciated.....fittings on the way.....I'm sure I'll be back for more advise....

[First c10]

Here is a picture of how I did it! I had to lower the fill spout so it would clear the bed floor

[A1971Blazer]

Originally Posted by First c10

Here is a picture of how I did it! I had to lower the fill spout so it would clear the bed floor

You guys are making this easy for me......thanks !

I do plan on reworking the neck to lower it and make it come out in the factory location for the Blazer....

OK...now the Corvette style filter/regulator.....which one is the best....GM ?

again thanks for all the help.....much appreciated...

[mongocanfly]

Ac delco (gm) probably best..I used wix..had no trouble with it..

[truckdude239]

Huh those wpuld have been nice lol i cut mine off amd used an compression fittings

[michael bustamante]

first c10: what did you do with the other lines?

[First c10]

The 5/8" line goes to the filler neck and the small 5/16 barb end is just a vent. It does have a rollover valve in it so you can run it up to the filler area and put a axle vent on it. That's what I was planning on doing.