I've got a leak that I think is coming from behind my crank pulley. It slings some oil onto my alternator and also onto my lower radiator hose, and generally all over the front of the engine. Really only seems to generate oil when engine is running because after I drive for even a little it will spray enough oil to make a drip or two onto my garage floor. Not major, just enough to make a small drip. Is this a common leak point?

[Linked Image]

83 4x4, 3" Lift, 33" Buckshot Mudders