I can't seem to find a dual line sending unit (3/8" fuel- 1/4" vent lines) for a '68 Firebird. Can I use one from a '69 Firebird? I see Classic Industries has one for only $50. Part number: 6428322. Will this fit a new '68 Gas tank?

Not sure if it will fit but a supplier here in Canada has the dual line listed to fit 67-69.They seem to be pretty knowledgeable, so it is possible the 69' you are looking at MAY work.
http://www.early-birds.com/part_223_230_238-29092.html

David

I'm almost positive that the 9 doesn't fit earlier fgf cars. Hold tight for other's comments.

Had the same problem before concerning my 68 Firebird coupe, finally bought part# FT-34 from Rick´s First Generation (USD 59.95). It´s a 69 (!) 3/8" tube and 1/4" return line repro fuel tank sending unit and at least it´s an exact match to the old one that was installed in my car before.
Unfortunately I don´t know if this one was correct or changed by one of the car´s pre-owners.

I posted some pics of the new and old unit at Yahoo!Photos, so you can take a look:

http://pg.photos.yahoo.com/ph/drbrandl123/album?.dir=/154e&.src=ph

Regards

Thomas

GJ,
I used the 69 one from Ricks First Gen Camaro too and it works just fine in my 400 68.

Thanks Thomas the pictures look identical to the one for sale by CI. So it looks like I will go with the 68 Fuel Tank kit from them with the 69 Sending unit.

Just to let everyone know. The '69 dual line (3/8" main/ 1/4" return) fuel sending unit DOES work in the 67-68 Gas tank. I just finished installing the tank today and driving the Firebird around the block. It's the first time the gas gauge actually registered the fuel level correctly!

"Paddock" is showing that they have repro. of it for 49.95 part #6428845R might check them out also

just a warning i got the paddock part #6428845r its the only one listed for 1968 firebirds and it is in correct it only has the 3/8" fuel line no return. When I calld back they don't stock the dual line even for a 1969 ?? gonna have to return and repurchase .