Gasoline Smell....where is it coming from?...6 conversion, Update 5/18 Options

[billh1963]

When driving the car (engine is a 2.2L 6 with triple Webers) I frequently smell gas. This is with the targa on or off. The smell comes and goes...it's not consistent; however, it always occurs

If I stop the car and check around the car (with the engine running) I don't smell it. With the engine running I have checked everywhere and don't see or smell anything. No drips or puddles under the car, around the carbs, etc. I have checked connections on the fuel pump and nothing there.

I have thought of two possibilities:
1. Leaking fuel line in the tunnel (which I should smell all the time...right?)
2. Fumes coming into the cockpit from the engine compartment.

Any other thoughts?


Update: 5/3
Drove the car extensively today and, as usual, the gas smell comes and goes. Stopped while the smell was strong and checked around the carbs...dry
Looked under the car...dry
Opened the trunk...no smell.
Even pulled the gear shift to see if there was a gas smell in the tunnel...nothing

The only thing I see is this line is hanging out in space...could the smell be coming from here?
Should I cap it or does it need to connect somewhere?
Remember...this car has triple webers...it's not fuel injected.

[McMark]

Do not cap the lines from the tank. If you seal it tight enough, your fuel pump will keep sucking fuel, but no air will enter the tank to fill the void. After awhile you start generating vacuum in the tank and the car will stall out as the vacuum increases and the pump can no longer suck hard enough.

You can run a longer line down under the car, but you may still get a fuel smell.

Two other thoughts on where the smell may come from:

1. Fuel filler leak - while cornering with a full(ish) tank the fuel may seep out and leaking seals and this fuel will evaporate and you will smell it. The canister around the filler neck also gathers some fuel slosh on a full tank. If the small line between the tank and the canister is old and cracked it can allow some fuel to leak out.
2. Carb Mixture - if the car is running rich (especially on overrun, which all carbs do) you may smell a rich exhaust mixture as the fume flow over the car when you pull up to a stop. My car does this when it's cold and the warmup enrichment in running. The exhaust fumes are sort of chasing you down the road, and when you stop, they keep moving forward and you can smell them.