Since you've worked on the cylinder head, check out the valve cover first. Chances are, you've got a leak there, which is running around the bellhousing and dripping off the bottom. Always remember, oil can't run uphill, so look for the highest wet spot.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!