Hey guys i got an event I'm trying to make in a week and my 91 fc coupe decided to start leaking fuel. Im trying to figure out what exactly this line is and where i can get one and/or what's the fastest and cheapest way to fix it. I did my best to follow the line and I'm about 90% sure the line im pointing at is the one I'm looking for. Please let me know if I'm wrong.

 

You're pointing to the vent line. It can leak fuel if fuel is getting in there, but fuel shouldn't be getting in there. The lines appear to be in poor condition. I replaced the fuel lines on an 85 I restored and used aluminum fuel line form Summit Racing. It came in a roll and it bent easily and was super easy to flare. I would honestly consider replacing both lines right up to the rubber hoses that connect to the emissions rack that feel fuel to the rails. Replace one at a time to ensure you have the proper routing and that the line is going to the proper spot. To get the original lines quick, you'll have to find someone local parting one out.