69 Chevelle BB fuel line requirement

[Woj]

I'm working on a project I bought a few weeks back, it is a 69 Chevelle 300 deluxe hard top, with a 427/TH400, factory AC car. Originally it had a 307/TH350. It currently has a single 5/16" fuel line; I want to change it to a 3/8" fuel line and use a quadrajet carb (don't laugh, I've got a guy that really knows how to make them work well).

It seems like many of the HP Chevrolets that used the quadrajet also had a 1/4"return line.

Does anyone know if the return line is necessary with the q-jet Big Block configuration?

My goal is to make it a great running, street-friendly car with a stock appearance. The engine and trans have been previously rebuilt.

Any thoughts would be appreciated.

Thanks.

Phil Woj

A few pix for the curious:

[Xplantdad]

Very cool car Phil!

[CC Rider]

Neat car! What's that white stuff next to the driveway? [img]<<GRAEMLIN_URL>>/grin.gif[/img]

[m22mike]

That's it Rick, rub it in... [img]<<GRAEMLIN_URL>>/no.gif[/img]...

[bluel78]

The use of a return line would help prevent vapor lock. The factory used them on the 325 and 350 h.p. for a reason. It's refreshing to see a malibu versus a poorly done cloned ss.

[Donnie]

Phil,
the return line went from the fuel pump back so it shouldn't
affect your Qjet if you dont use it.

[WILMASBOYL78]

Nice looking ride...good luck.

wilma

[Woj]

Gents,

Thanks for the input. I've seen many a q-jet car (other than BB Chevys) that did not have a return line. Just want to be sure before going through the ordeal to change lines from the 5/16&quot; to 3/8&quot; line.

Phil Woj.

[Bill Rose]

The return line didn't appear until 69 Phil. My 68 SS-396 has a q-jet, and a single 3/8&quot; fuel line. You just need the fuel pump to go with it.

[wheelhop]

Neat car Phil. Keep up the good work!