I've used an oddball offset wrench for that one, a tool I inherited from my father. It's not all that difficult to make one out of scrap metal with a little creative welding, though. Otherwise, I guess pulling the rockershaft is the only other option.
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!