Another approach is running Accel short-insulator spark plugs and 90 degree plug boots with the wires zip-tied together pointing away from the header tubes. Been there, done that, until a few of my customers got over their stupid attack and went back to manifolds.
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!