Same here....
The one piece gaskets just don't seem to fit as well as they should. Add aftermarket
oil pans with their own tolerances and aftermarket timing covers with their own tolerances and it's a stab in the dark.
To the OP:
You would be surprised to see where
oil actually comes from. For instance,
oil leaks that appear on the bellhousing can actually blow back from the front.
In your case, I would do what Bob suggested and see if you can find a trail. You can also buy UV dye to put in the oil. Fire it up and let it run, then use a black light and see what you get.
The oil pan shouldn't leak unless the oil level is up that high....which it shouldn't be. I would guess that it's something higher that is under pressure or under fluid level that is trickling down.