I have changed the Front Struts and can still hear a loud clunking noise when I hit a bump.
What could this be?

 

My 94 has 227,000 miles (3.3 Liter)and still running good...however lately ive noticed big oil leaks in the garage. The leak is toward the front of the motor. Just had a Gasket sets replaced (Head, Valve covers and manifold) so I know its not those. The leak is in the front....oil all over the pulleys and splash guard.

Could this be the Crankshaft Seal....and if so how hard is it to change?

 

Could be the timing cover or the crankshaft seal. As far for the clunking sound, ck the bolts on the ball joints and sway bar bushings too.