If it's dripping from the transmission pan and is definitely engine oil the china wall/manifold seal may be the culprit.  Use your black lite or some jock itch spray on the high point of the bell housing directly behind the manifold.  Is it possibly coming from the rear of the engine....between the block and block plate and coming out the bottom of the bell housing?  This would indicate rear main seal or....leaky cam-bore plug or oil gallery plug.
Good luck, keep us in the loop.  You ain't the first or last to be chasing oil leaks.

BB1
 

Chased same symptoms on Al’s 408 to bad timing cover gasket. 
Even the jock itch spray failed to see the oil traveling along the top edge of the pan gasket.

Se my LEARNED SOMETHING NEW post

I had a valve cover leak in the back of the engine.  You could not see it or feel it.   You had to have the engine running before hot oil leaked out.  when the engine stopped, the leak stopped.

Just a follow up on the outcome. I put the rear of the car on jack stands in hopes of redirecting the drip. Checked a couple days later and no drip puddle under the car. Put the front of the car on jack stands and couple days later, hand size oil puddle. While the front was still raised, I was able to finally see the oil trail from the back right corner of the intake and down over the bell housing. 
Now I'm trying to doctor the leak without having to R&R the intake. Thanks to all for the input.