Last night i pulled the top of the carb off and looked at the screw you had mentioned. I also noticed there is another jet on the deck of the main body. Do you know what this jet is for and does this carb have primary and secondary metering? The reason i asked is because the adjustment screw that is attached to the metering rod hanger seems to have little efect until the last half inch of throttle travel(wide open). In other words the adjustment screw does not make contact with the stop until almost full throttle. When running the smog test i would say he only brings it up to 3k RPM and just barely opens the throttle.

This is what I observed when opening the throttle. The metering rod, adjustment screw, accelerater pump and hanger all moved together. The only time the adjustment screw would hit it's stop is at almost full throttle which leads me to believe that this is secondary metering and probably not causing my part throttle rich condition.

Also i did not attempt to adjustth the scew. It looked to be more than one turn out to begin with and that would be leaner than one turn.

I'm still open for any ideas. I'll be playing with it tonight!

Thanks
John