OK I did a search for fuel line and evap canister etc. I need to know which line on the pass side of my 87 T/A (LG-4) is the supply line and which is the return. One is larger than the other and I am assuming that it is the return but I am not sure. It has been 9 months or better since I pulled the 305 and I didn't mark them and forgot.

 

The return is smaller than the supply.

 

Cool. I wasn't sure because the smaller of the two was the one dripping gas. For a month or so I would smell gas real bad in the garage, and there would be a small puddle under the smaller line that would come and go. It would get worse with weather changes. I eventually plugged it off after a couple of weeks or so to stop the leaking. The tank was about 1/2 full.