It looks like a rear main bearing seal job is in your future before too long. Also take a look at the valve cover gasket- - - -with the slight tilt toward the rear of the engine, any valve cover seepage ends up in the bell housing. At least the sheet metal flywheel cover seldom rusts out!
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!