Please clarify what you mean by ".... I can not get it to idle below 1000 as we are bottomed out on the idle adjustment ..."
Does this mean that the throttle plates are open as far as possible with the adjustment screw at 1000 rpm, or are they in the closed position?
When at an idle in neutral, if you put you hand over he middle carb to choke it, does the idle speed increase initially before dropping off?....if so, it could be a vacuum leak.
If I can give my after I've adjusted the center and outboards (promax baseplates installed) advanced the timing to where is really healthy, and vacuum is at 18 I'm idling around 1400rpms and I can't get the curb idle screw to get any lower the maybe 1200.
after I've adjusted the center and outboards (promax baseplates installed) advanced the timing to where is really healthy, and vacuum is at 18 I'm idling around 1400rpms and I can't get the curb idle screw to get any lower the maybe 1200.