Here's the permanent solution- - - - - -a full circle lip seal- - - -but you need to get the back of the block and the rear main bearing cap machined to accept it.

http://mlineseals.com/oil-seal/38691/

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!