A shade tree method of accomplishing the same rocker arm oiling as the drilled head bolt is to grind a flat spot on the threads of the center head bolt on the passenger's side, or cut a slot in the threads with a cutoff wheel in a Dremel tool or a small angle grinder.
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!