I have been able to drive the car and at 2000 RPM and up it will run okay, choke butterfly still 90% closed, but when I slow down like for a stop it will buck and carry on and then quit. I am going to re-verify all timing settings, belt, TDC, distributor, etc. Then check for vacuum leaks using a smoke machine. If none of these fix it I will re-build the carb again. Maybe I missed something.