If you choose to keep the ground wire there, use a piece of highly flexible wire, like the kind used for voltmeter test leads. The distributor housing on a stovebolt is moving constantly from the action of the vacuum advance, and a regular wire will get metal fatigue and break strands pretty quickly.
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!