Unless you're trying to build some sort of 100% original show truck, the fix for a 292 is to install the HEI ignition distributor that's on the later model 250's and 292's. Your electrical system is already 12 volts, so the only other modification needed will be a #12 or larger power wire from the ignition switch to the distributor. HEI's were invented to meet the government requirement that any system that has an effect on exhaust emissions must be able to run 50K miles without being serviced.
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!