"INTERRRRRESSSSTING!" Basically what's being done is eliminating the electronic timing advance circuits, and leaving the coil trigger circuit intact. Then the centrifugal and vacuum advance can take over to control the timing like the earlier distributor did.
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!