Fuel lines/Pump & Tank Questions

[SB'72]

Hello,
I have a 1972 C/10 1/2 ton 2wd with 350 and TH350.
Trying to figure out if fuel system is hooked up properly with what's currently there. I have a fuel pump with inlet from tank, outlet to carb, and another smaller outlet, which I assume is a return of sorts. I currently have a Evaporative Emission Control gas tank, but none of the canister related items were there. So if I hook up the smaller line back to the tank as a return will that be ok? I have pasted a pictures of tank/pump like I have, that is if I inserted them right.

Thanks in advance for any help guidance

http://67-72chevytrucks.com/vboard/a...1&d=1377279524

http://67-72chevytrucks.com/vboard/a...1&d=1377279424

[GASoline71]

I would get a fuel pump without the return line. Plug all the other lines that you don't need, and get a vented gas cap. That's what I did on my '72.

Unless you're wanting to try to hook up the EEC system. The you'll need a non-venting gas cap.

Gary

[SB'72]

I had looked into that option as well, but all the caps I came across were non vented unless you went to a cap for a C/20, but think the filler necks on tank are different.

[88Ironduke]

I've been wondering about the evap system myself. My truck has long since lost its emissions sticker....If the system is operating normally will it eliminate the gas fumes I see people complaining about in the cab? I can see where the system would reduce or even eliminate fumes in the cab. Plus the evap cainster looks pretty standard so replacements should not be too expensive.

88Ironduke

[richards72chevy]

I have the the problem of gas coming out of a line close to the engine when my tank is topped off.I have tried all kinds of caps and nothing has worked.