The carb is seeping fuel. Could be from the filter inlet, since it is in that area. You say the fuel line is tight, but is the fitting that the fuel line goes into also tight in the carb? There is a really thin nylon gasket that fits onto the end of the filter inlet, and that thing will seep if it is damaged, or loose. IT isn't enough of a leak to be visible, but it will seep out over time, and stain the intake like you describe.
It could also be a crack in the fuel bowl, but the fuel inlet seeping is more likely. I would suggest removing the filter inlet, and replacing that gasket on the end of it first. You can clean the intake, and get it dry, then place a paper towel under the inlet overnight, and see if there is any indication of seepage at that location.
Adams' Apple2010-07-11 08:44:08

I hate "seepage"

ebo

Well, it seems like this problem has reared its ugly head again.

After a 10 mile ride this morning I noticed the odor of gas fumes. After a look under the hood the same stain is present on the intake manifild and gasoline is definitely dripping out of the same location as before.

Hey Kevin, do you know how to weld Maybe some sealant on the threads? Not sure about that with the gas you need info from someone with more smarts about carbs than me. Good luck, hope to see you this fall.

I'm thinking the fuel line may have a small split in it on the end.  You will need to remove the line from the carb and examine it.  A new line is not too hard to replace.  DB

Gonna have to replace the gasket, IF it is leaking from the fitting going into the carb. Once tightened so far, the gasket will split. AS Dennis mentioned, the fuel line itself can develop a split, or the flare can be crushed enough to leak.
One trick to a temporary "fix" for the gasket is to run a couple rounds of sewing thread around behind it. You want to put the thread between the gasket, and the fitting, where it seats. This will make the gasket "thicker", basically, so it will seal. IF the gasket is actually split tho, this won't do any good, and will prolly make it worse.
My suggestion would be to remove the fitting, and replace the gasket. I don't know that you can get that gasket by itself...it does come in a carb O/H kit, tho...

(Tanx, Ken )

Hey Fellers,

Thanks for the input on this.

I checked Auto Zone for just such a gasket with no success. The guy behind the counter might have been wingin' it. He told me the Edelbrock rebuild kit would have the gasket I need. I just was'nt sure he was right, so I held off. Maybe just a bad vibe, I dunno.