Your distributor is leaking oil where can it be coming from because you've try to change the distributor but it still leaking?
This could also be caused by a clogged PCV system which is
common on these cars especially the 7mge. Pull the oil fill cap
with the engine running. If you have a lot of pressure comming out
you probably have what is called "blowby". If you have much blowby
it will push oil out of anyplace that doesn't have a positive seal,
that could include the distributor shaft. If you have that much
blowby, the rings are worn and the only option is to rebuild or
replace the engnine.