You've got one too many carburetors- - - -no wonder you're having trouble! Unless you come up with two very small-venturi carbs and match then perfectly, dual carbs are nothing but a headache, as it seems you've discovered. If you're running a 235, you might choose a Weber 2-barrel with progressive throttle linkage, or the original Rochester or Carter 1-barrel. Either setup will be an improvement over the average 2-carb installation.
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!