The ignition only needs to be disabled for a fraction of a second to unload the driveline. That can be done just as easily by momentarily interrupting the power to the ignition, not the ground, with a very simple circuit through a microswitch on the throttle linkage.

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!