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Old 12-26-2017, 07:35 PM   #4
71CHEVYSHORTBED402
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Re: WTB '72 402 orig hardline fuel pump to orig quadrajet

Quote:
Originally Posted by leddzepp View Post
I have never been able to get the correct one for a 72 aftermarket. They have a different bend due to the fuel pump having a return line added in.
BASTARDS.............. 71 & prior don't have a return line I know of. I wonder the impact? If the outlet fitting is positioned differently for a return line, figure that means it works on a pump without a return line?

OT: Contrary to popular belief, and clarifications welcome, the 1971 cab tanks and pumps did not have a return line. There was one fuel line to the pump, and one vent line to the vapor can. I believe that applies to some 70s as well, Ca. mandate or somethin'. And no, a return line has nothing to do with A/C. If it does, then GM didn't realize it until 72, for why I couldn't tell you.

The 71 takes a different gas cap as well. Can't remember, but I think the 1970 EEC used the same.



Not to hijack the OP, but if anyone has or makes one that's nice and suits a 71, then I'm interested. The 71 has just one line that connects between the tank and pump (no return line), and please, the correct threads between the pump and Rochester carb on a 402, TH400. I have A/C if it matters, but I bet it doesn't. Best of luck OP, my 72 has some Edelbrock BS, but at least it's hard line.
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Tony

71 Custom Deluxe, SWB, 2WD, 402, A/C.

I developed an assembly guide (kit) for restoring this truck from the ground up, complete with details including full hardware descriptions. Much of the info. applies to all 67-72 GM. My build thread, with some info. about the assembly kit https://67-72chevytrucks.com/vboard/...d.php?t=730025

Last edited by 71CHEVYSHORTBED402; 12-26-2017 at 07:42 PM.
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