You're using a racing distributor with proprietary electronics in a street application. Like the woman who had the ugly baby- - - -"You grew it- - - -now you'd better learn to love it!" The lack of a vacuum advance is costing you 2-3 MPG of fuel economy on the street. Either swap to a more appropriate distributor or resign yourself to breaking down at unexpected and possibly dangerous moments.
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!