You could have a pinhole in one of your diaphragms, your timing may be off, float levels low causing lean condition, tank vent blockage causing lean condition. Check your coil wires. I had a similar thing on my RD and I found the coil wires were corroded where the wires went into the coil. It ran great except at the top of the rev range under WOT. Even then it wasn't bucking like you'd expect, it would just surge a little, and not make the kind of power it should.
I wouldn't bring her home to Mama, but Mama ain't home tonight.