Zenith carbs follow-up - making progress??

[rgnprof]

OK - can someone explain what this means??

Zenith carbs - 1972 - I've had trouble getting them to idle right without having fuel come from the preatomizer (main driving circuit) in the center of the primary barrel.

Tried to synch today - thinking this was the problem. I have been able to get it to idle, at 760-789 rpm w/o fuel dripping - so maybe some progress - but they don't sound synchronized to me - rear carb is louder than the front (using the hose method).

Rear carb - 1) remove mixture screw and car stalls, 2) cover the carb and car stalls, 3) unplug the idle control solenoid and car stalls, and 4) cover idle air hole and idle slows just a little

Front carb - 1) remove mixture screw and idle slows to 400 rpm, but doe not stall, 2) cover the carbs and car slows to 200 rpm, chugs but doesn't stall, 3) unplug idle control solenoid and idle slows (400-600) but car does not stall, and 4) cover idle air hole and car slows a little - similar to rear carb.

Which one - if either - is right? Anyone can any ideas? I'm thinking the front carb is not performing correctly. Also, I have checked and checked for vacuum leaks by spraying carb cleaner around both carbs - earlier I thought it was leaking around the base, but now no changes in idle that I can find.

Thanks, Ryan