Metal core wires cause the carbon center button in the distributor cap and the tip of the rotor to erode rapidly. As long as you don't mind changing the cap and rotor at every tuneup, run whatever floats your boat.
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!