Are you running the stock point-type ignition system, or a HEI? By simply adding a ballast resistor to your hot wire, you can run it for years. The HEI doesn't need a resistor, so it can be run indefinitely, also. The only danger is if you run a point-type system without a resistor.
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!