Buick (also Olds and Cadillac) was running those emission control engines so lean that they needed the wide gap in hopes that something combustible was between the electrodes when the plug fired! Cadillac actually specified an .080" plug gap on some engines!
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!