1990 Chrysler Le Baron leaky oil on engine

I have an oil leak on the front of the engine.I have had some work done with the crankshaft seal replaced and the leak still persist.I had the engine steamed cleaned and with the vechicle ilded their is no visial leak,when i drive 1 mile then i check the engine the leak gets oil on the front of the engine around the distributor in the middle of engine. I cant see where the oil leak is comming from. please give me a clue what it might be.