Lipstick on a pig- - - -unless you also increase the airflow past the valves (impossible due to port design) no matter what you do with the manifold will be time and effort wasted. That's why dual carburetors are only for looks, also.
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!