They probably forgot to seal the keyway of the crankshaft pulley. Oil is seeping out through the small spaces bewteen the key and the key way. Only way to fix this is to remove the pulley bolt, clean the pulley and keyway with a good cleaner like brake cleaner. If you want to you can also replace the front crankshaft seal. To replace this seal you remove the crank pulley and the seal can be poped out. Tap the new seal into place, put the crank pulley back on, clean the crank pulley, seal the keyway and install a new bolt and washer. The crank pulley bolt and washer should not be re-used.
You can do this yourself, there is a write up in the How-to section of this site. All the Ford part numbers for the parts I mentioned are listed here also.
here ya go