Be careful- - - -there's such a thing as too much oil sealing. If you go with umbrella seals (really foolish idea, BTW) take the O ring seals off that fit below the split keepers on the valve stem. Valve guides need to have a little lubrication- - - - -running them totally dry with too much sealing wears them out and creates massive oil consumption that no kind of seal can cure.
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!