I did a compression test and they were all between 169 and 177, checked all the valves and they are all opening fine. I took the carb off and there was some dirt in the left bowl, soaked it overnight, blew it all out. It is better but still there just not as extreme. Runs fine cruising but has dull accelleration after feathering it through the dead spot. The two metering rods control fuel flow during accelleration or all the time? Could it be timing, say needing different advance wieghts in the distributor? Advance to timing a touch? I moved the linkage on the accelerator pump arm up to the top and no difference so I put it back in the center. Could the front 2 adjustable jets have anything to do with it? Also inside my exhaust pipe is pitch black soot, to rich huh?